Tag: 200-300

《C14H10 polycyclic aromatic hydrocarbon formation by acetylene addition to naphthalenyl radicals observed》 was written by Yang, Jeehyun; Smith, Mica C.; Prendergast, Matthew B.; Chu, Te-Chun; Green, William H.. Synthetic Route of C10H7I And the article was included in Physical Chemistry Chemical Physics in 2021. The article conveys some information:

The formation of polycyclic aromatic hydrocarbons (PAHs) during combustion has a substantial impact on environmental pollution and public health. The hydrogen-abstraction-acetylene-addition (HACA) mechanism is expected to be a significant source of larger PAHs containing more than two rings. In this study, the reactions of 1-naphthalenyl and 2-naphthalenyl radicals with acetylene (C2H2) are investigated using VUV photoionization time-of-flight mass spectrometry at 500 to 800 K, 15 to 50 torr, and reaction times up to 10 ms. Our exptl. conditions allow us to probe the Bittner-Howard and modified Frenklach HACA routes, but not routes that require multiple radicals to drive the chem. The kinetic measurements are compared to a temperature-dependent kinetic model constructed using quantum chem. calculations and accounting for chem.-activation and fall-off effects. We measure significant quantities of C14H10 (likely phenanthrene and anthracene), as well as 2-ethynylnaphthalene (C12H8), from the reaction of the 2-naphthalenyl radical with C2H2; these results are consistent with the predictions of the kinetic model and the HACA mechanism, but contradict a previous exptl. study that indicated no C14H10 formation in the 2-naphthalenyl + C2H2 reaction. In the 1-naphthalenyl radical + C2H2 reaction system, the primary product measured is C12H8, consistent with the predicted formation of acenaphthylene via HACA. The present work provides direct exptl. evidence that single-radical HACA can be an important mechanism for the formation of PAHs larger than naphthalene, validating a common assumption in combustion models. The experimental part of the paper was very detailed, including the reaction process of 1-Iodonaphthalene(cas: 90-14-2Synthetic Route of C10H7I)

1-Iodonaphthalene(cas: 90-14-2) is one of organic iodides. Organic iodides are used in veterinary products (Organic Iodide Powder) as a nutritional source of iodine. In the chemical industry, alkyl iodides serve as excellent alkylating agents and, specifically, methyl iodide is used as a methylating agent in the synthesis of various pharmaceutical drugs. Oceanic alkyl iodides are believed to be the principal source of atmospheric iodine.Synthetic Route of C10H7I

Referemce:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com

《The Value of Failure: A Student-Driven Course-Based Research Experience in an Undergraduate Organic Chemistry Lab Inspired by an Unexpected Result》 was written by Heller, Stephen T.; Duncan, Andrew P.; Moy, Cheryl L.; Kirk, Sarah R.. Application In Synthesis of 1-Iodopyrrolidine-2,5-dione And the article was included in Journal of Chemical Education in 2020. The article conveys some information:

Research experiences are widely understood to be valuable for the intellectual and professional development of undergraduate science students. Course-based undergraduate research experiences (CUREs) have become popular as a means of engaging large numbers of students in research by leveraging institutional supports for laboratory courses. At Willamette University, we have adapted a guided inquiry experiment that gave unexpected results into a CURE in the lower-division organic chem. curriculum. This experience has engaged several cohorts of students in a seven-week investigation focused on identifying the mechanistic origin of a nonstereospecific hydroxybromination of Z-stilbene, an observation that contradicts how this addition reaction is presented in standard organic chem. curricula. Each year, the cohort exptl. “”discovers”” the anomalous stereochem. outcome of the addition reaction. Over the next three lab sessions, students execute their experiments, reconsidering and revising their hypotheses as their data dictate. The experience culminates in formal oral and written presentations of results. Student perceptions of the pedagogical value of the CURE, the effect of the lab on their self-efficacy, and the novelty of research being conducted were assessed in multiple class cohorts, while faculty perceptions of changes in student behavior and skill were also documented. The experimental process involved the reaction of 1-Iodopyrrolidine-2,5-dione(cas: 516-12-1Application In Synthesis of 1-Iodopyrrolidine-2,5-dione)

1-Iodopyrrolidine-2,5-dione(cas: 516-12-1) is used in the preparation of vinyl sulfones from olefins and benzenesulfinic acid. It acts as a source for I+ and involved in Hunsdiecker reactions for the conversion of cinnamic acids, and propiolic acids to the corresponding alfa-halostyrenes and 1-halo-1-alkynes respectively. Application In Synthesis of 1-Iodopyrrolidine-2,5-dione

Referemce:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com

《Liquid crystalline behaviors of three series of hockey stick-like compounds》 was written by Jin, Gege; Guo, Yongmin; Wu, Limin; Li, Yi; Li, Baozong; Yang, Yonggang. SDS of cas: 626-02-8 And the article was included in Molecular Crystals and Liquid Crystals in 2020. The article conveys some information:

Three series of meta-perfluoroalkylphenol esters are synthesized. Both SmA and SmC phases are identified. Their clearing points increase with increasing the perfluorocarbon chain length, while decrease with increasing the alkoxy chain length. Comparison of the 3-tridecafluorohexylbenzoates and 3-tridecafluorohexylphenol esters, the 3-tridecafluorohexylbenzoates show higher clearing points, indicating that the direction of the ester bond plays an important role in the thermostability of the liquid crystalline phases. Moreover, it was proposed that the compounds with short and long alkoxy chains packed into different structures.3-Iodophenol(cas: 626-02-8SDS of cas: 626-02-8) was used in this study.

3-Iodophenol(cas: 626-02-8) belongs to organic iodides. Generally organic iodides can be divided into two classes of alkyl iodides and aryl iodides. SDS of cas: 626-02-8 Typical reactions of alkyl iodides include nucleophilic substitution, elimination, reduction, and the formation of organometallics.

Referemce:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com

《Diversity-Oriented Synthesis of Thiazolidine-2-imines via Microwave-Assisted One-Pot, Telescopic Approach and Its Interaction with Biomacromolecules》 was published in ACS Combinatorial Science in 2020. These research results belong to Saikia, Ananya Anubhav; Rao, Ramdas Nishanth; Maiti, Barnali; Balamurali, Musuvathi Motilal; Chanda, Kaushik. Synthetic Route of C2H4I2 The article mentions the following:

In this work, a one-pot, telescopic approach is described for the combinatorial library of thiazolidine-2-imines. The synthetic manipulation proceeds smoothly via the reaction of 2-aminopyridine/pyrazine/pyrimidine with substituted isothiocyanates followed by base catalyzed ring closure with 1,2-dibromoethane to obtain thiazolidine-2-imines with broad substrate scope and high functional group tolerance. The synthetic strategy merges well with the thiourea formation followed by base catalyzed ring closure reaction for the thiazolidine-2-imine synthesis in a more modular and straightforward approach. The synthetic procedure reported herein represents a cleaner route toward thiazolidine-2-imines as compared to traditional methodologies. Moreover, the biol. significance of combinatorially synthesized thiazolidin-2-imines has been investigated for their use as possible inhibitors for acetyl cholinesterase through mol. docking studies.1,2-Diiodoethane(cas: 624-73-7Synthetic Route of C2H4I2) was used in this study.

1,2-Diiodoethane(cas: 624-73-7) is one of organic iodides. Alkyl iodides react at a faster rate than alkyl fluorides due to the weak C-I bond. Iodo alkanes participate in a variety of organic synthesis reactions, which include the Simmons–Smith reaction (cyclopropanation using iodomethane), Williamson ether synthesis, Wittig reaction, Grignard reaction, alkyl coupling reactions, and Wurtz reaction.Synthetic Route of C2H4I2

Referemce:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com

《Sequential One-Pot Coupling Reactions of Diiodobenzenes, Propiolic Acid, and Aryl Halides for the Synthesis of Diarylalkynyl Arenes》 was published in Asian Journal of Organic Chemistry in 2020. These research results belong to Ryu, Beomseok; Oh, Jonghoon; Lee, Sunwoo. Reference of 1-Bromo-4-iodobenzene The article mentions the following:

Diiodobenzenes were employed in palladium-catalyzed one-pot sequential reactions with propiolic acid and aryl halides to provided the corresponding diarylalkynyl benzenes. The combination of Pd(PPh3)4 (10 mol %) and DBU (5.0 equiv) gave optimal results in the sequence. Reactions with 1,2-diiodobenzene gave higher yields than those utilizing 1,3- and 1,4-diiodobenzenes. Furthermore, benzenes bearing electron-donating substituents gave higher yields than those with electron-withdrawing substituents. In the experimental materials used by the author, we found 1-Bromo-4-iodobenzene(cas: 589-87-7Reference of 1-Bromo-4-iodobenzene)

1-Bromo-4-iodobenzene(cas: 589-87-7) has been employed as reagent for in situ desilylation and coupling of silylated alkynes, as starting reagent in the total syntheses of ent-conduramine A and ent-7-deoxypancratistatin (alkaloids), as substrate in copper-free Sonogashira coupling in aqueous acetone in synthesis of β,β,dibromostyrenesReference of 1-Bromo-4-iodobenzene

Referemce:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com

《Palladium-Catalyzed Synthesis of α-Carbonyl-α’-(Hetero)aryl Sulfoxonium Ylides: Scope and Insight into the Mechanism》 was published in Journal of Organic Chemistry in 2020. These research results belong to Janot, Christopher; Chagnoleau, Jean-Baptiste; Halcovitch, Nathan R.; Muir, James; Aissa, Christophe. Recommanded Product: Trimethylsulfoxonium iodide The article mentions the following:

Despite recent advances, a general method for the synthesis of α-carbonyl-α’-(hetero)aryl sulfoxonium ylides is needed to benefit more greatly from the potential safety advantages offered by these compounds over the parent diazo compounds Herein, the palladium-catalyzed cross-coupling of aryl bromides and triflates with α-carbonyl sulfoxonium ylides is reported. The use of this method for the modification of an active pharmaceutical ingredient and to the synthesis of a key precursor of antagonists of the neurokinin-1 receptor is also reported. In addition, the mechanism of the reaction was inferred from several observations. Thus, the oxidative addition complex [(XPhos)PhPdBr] and its dimer were observed by 31P{1H} NMR and these complexes were shown to be catalytically and kinetically competent. Moreover, a complex resulting from the transmetallation of [(XPhos)ArPdBr] (Ar = p-CF3-C6H4) with a model sulfoxonium ylide was observed by mass spectrometry. Finally, the partial rate law suggests that the transmetallation of and the subsequent deprotonation are rate-determining in the catalytic cycle. In addition to this study using Trimethylsulfoxonium iodide, there are many other studies that have used Trimethylsulfoxonium iodide(cas: 1774-47-6Recommanded Product: Trimethylsulfoxonium iodide) was used in this study.

Trimethylsulfoxonium iodide(cas: 1774-47-6) is a sulfoxonium salt. It is used to generate dimethyloxosulfonium methylide by reaction with sodium hydride. The latter compound is used as a methylene-transfer reagent, and is used to prepare epoxides.Recommanded Product: Trimethylsulfoxonium iodide

Referemce:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com

《Cu(I)/sucrose-catalyzed hydroxylation of arenes in water: the dual role of sucrose》 was published in Organic & Biomolecular Chemistry in 2020. These research results belong to Watanabe, Kohei; Takagi, Mio; Watanabe, Ayako; Murata, Shigeo; Takita, Ryo. Product Details of 625-99-0 The article mentions the following:

A protocol for the hydroxylation of aryl halides catalyzed by copper(I) and sucrose in neat water was developed. The dual role of sucrose, the reaction pathway, and the high selectivity for hydroxylation were investigated using a combination of exptl. and theor. techniques. The experimental part of the paper was very detailed, including the reaction process of 1-Chloro-3-iodobenzene(cas: 625-99-0Product Details of 625-99-0)

1-Chloro-3-iodobenzene(cas: 625-99-0) belongs to organic iodides. The carbon-iodine bond is weaker than other carbon-halogen bonds due to the poor electronegative nature of the iodine atom. Organic iodides can be alkyl, alkenyl, or alkynyl, and all of them are very reactive toward with many kinds of nucleophiles.Product Details of 625-99-0

Referemce:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com

《Photochemical Functionalization of Heterocycles with EBX Reagents: C-H Alkynylation versus Deconstructive Ring Cleavage》 was published in Chemistry – A European Journal in 2020. These research results belong to Voutyritsa, Errika; Garreau, Marion; Kokotou, Maroula G.; Triandafillidi, Ierasia; Waser, Jerome; Kokotos, Christoforos G.. COA of Formula: C7H5IO2 The article mentions the following:

Herein, a cheap and efficient photochem. method for the C-H functionalization of saturated O-heterocycles, as well as the deconstructive ring-cleavage of S-heterocycles, employing hypervalent iodine alkynylation reagents (ethynylbenziodoxolones, EBX) were reported. This photochem. alkynylation was performed utilizing phenylglyoxylic acid as the photoinitiator, leading to the corresponding products in good to high yields, under household fluorescent light bulb irradiation When O-heterocycles were employed, the expected α-C-H alkynylation took place. In contrast, oxidative ring-opening to form a thioalkyne and an aldehyde was observed with S-heterocycles. Preliminary mechanistic experiments were presented to give first insights into this puzzling divergent reactivity. In the experiment, the researchers used 2-Iodobenzoic acid(cas: 88-67-5COA of Formula: C7H5IO2)

2-Iodobenzoic acid(cas: 88-67-5) belongs to organic iodides. The carbon-iodine bond is weaker than other carbon-halogen bonds due to the poor electronegative nature of the iodine atom. COA of Formula: C7H5IO2 Organic iodides can be alkyl, alkenyl, or alkynyl, and all of them are very reactive toward with many kinds of nucleophiles.

Referemce:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com

In 2019,Organic & Biomolecular Chemistry included an article by Pan, Yingying; Gong, Yuxin; Song, Yanhong; Tong, Weiqi; Gong, Hegui. Reference of 4-Iodobenzaldehyde. The article was titled 《Deoxygenative cross-electrophile coupling of benzyl chloroformates with aryl iodides》. The information in the text is summarized as follows:

This work describes Ni-catalyzed cross-electrophile coupling of benzyl chloroformate derivatives R1CH(R2)OC(O)Cl (R1 = C6H5, 4-FC6H4, 3-CH3C6H4, etc.; R2 = H, Me, butyl) with aryl iodides ArI (Ar = biphenyl-4-yl, naphthalen-1-yl, 3-oxo-2,3-dihydro-1H-inden-5-yl, 1-benzothiophen-5-yl, etc.) that generates a wide range of diaryl methane products R1CH(R2)Ar. The mild reaction conditions merit the C-O bond radical fragmentation of benzyl chloroformates via halide abstraction or a single electron reduction by a Ni catalyst. This work offers a new substrate type for cross-electrophile couplings. In the part of experimental materials, we found many familiar compounds, such as 4-Iodobenzaldehyde(cas: 15164-44-0Reference of 4-Iodobenzaldehyde)

4-Iodobenzaldehyde(cas: 15164-44-0) is used in synthesis of 4-[2-(trimethylsilyl)ethynyl]benzaldehyde, 5,15-dimesityl-10-(3-[2-(trimethylsilyl)ethynyi]phenyl}-20-(4-iodophenyl)porphyrin, and 5,15-dimesityl-10-[3,5-bis{2-[4-(N,N’-difluoroboryl-1,9-dimethyidipyrrin-5-yl)-phenyl]ethynyl}phenyl]-20-(4-iodophenyl)porphyrin.Reference of 4-Iodobenzaldehyde

Referemce:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com

In 2019,Advanced Materials (Weinheim, Germany) included an article by Xu, Yuwei; Liang, Xiaoming; Zhou, Xuehong; Yuan, Peisen; Zhou, Jiadong; Wang, Cong; Li, Binbin; Hu, Dehua; Qiao, Xianfeng; Jiang, Xiaofang; Liu, Linlin; Su, Shi-Jian; Ma, Dongge; Ma, Yuguang. Name: 1-Bromo-3-iodobenzene. The article was titled 《Highly Efficient Blue Fluorescent OLEDs Based on Upper Level Triplet-Singlet Intersystem Crossing》. The information in the text is summarized as follows:

Purely organic electroluminescent materials, such as thermally activated delayed fluorescent (TADF) and triplet-triplet annihilation (TTA) materials, basically harness triplet excitons from the lowest triplet excited state (T1) to realize high efficiency. Here, a fluorescent material that can convert triplet excitons into singlet excitons from the high-lying excited state (T2), referred to here as a “”hot exciton”” path, is reported. The energy levels of this compound are determined from the sensitization and nanosecond transient absorption spectroscopy measurements, i.e., small splitting energy between S1 and T2 and rather large T2-T1 energy gap, which are expected to impede the internal conversion (IC) from T2 to T1 and facilitate the reverse intersystem crossing from the high-lying triplet state (hRISC). Through sensitizing the T2 state with ketones, the existence of the hRISC process with an ns-scale delayed lifetime is confirmed. Benefiting from this fast triplet-singlet conversion, the nondoped device based on this “”hot exciton”” material reaches a maximum external quantum efficiency exceeding 10%, with a small efficiency roll-off and CIE coordinates of (0.15, 0.13). These results reveal that the “”hot exciton”” path is a promising way to exploit high efficient, stable fluorescent emitters, especially for the pure-blue and deep-blue fluorescent organic light-emitting devices. After reading the article, we found that the author used 1-Bromo-3-iodobenzene(cas: 591-18-4Name: 1-Bromo-3-iodobenzene)

1-Bromo-3-iodobenzene(cas: 591-18-4) has been used in the preparation of 1-(3′-bromophenyl)-3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10-heptadecafluorodec-1-ene and 1-(3′-bromophenyl)-3,3,4,4,5,5,6,6,7,7,8,8,8-tridecafluorooct-1-ene.Name: 1-Bromo-3-iodobenzene Further, it is involved in the preparation of oxygen-tethered 1,6-enynes.

Referemce:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com