Tag: 200-300

Quadruple C-H activation coupled to hydrofunctionalization and C-H silylation/borylation enabled by weakly coordinated palladium catalyst was written by Tang, Bo-Cheng;Lin, Wen-Xuan;Chen, Xiang-Long;He, Cai;Ma, Jin-Tian;Wu, Yan-Dong;Lan, Yu;Wu, An-Xin. And the article was included in Nature Communications in 2020.Formula: C7H3F2IO2 This article mentions the following:

A quadruple C-H activation cascade as well as hydro-functionalization, C-H silylation/borylation sequence based on weakly coordinated palladium catalyst was reported . The hydroxyl group modulated the intrinsic direction of the Heck reaction, and then acts as an interrupter that biases the reaction away from the classic β-H elimination and toward C-H functionalization. Mechanistically, d. functional theory calculation provides important insights into the key six-membered oxo-palladacycle intermediates, and indicates that the β-H elimination was unfavorable both thermodynamically and kinetically. In this article, the versatility of this approach, which was a strategic expansion of the Heck reaction was focused. In the experiment, the researchers used many compounds, for example, 2,2-Difluoro-4-iodobenzo[d][1,3]dioxole (cas: 531508-54-0Formula: C7H3F2IO2).

2,2-Difluoro-4-iodobenzo[d][1,3]dioxole (cas: 531508-54-0) belongs to iodide derivatives. Organic iodides can be alkyl, alkenyl, or alkynyl, and all of them are very reactive toward with many kinds of nucleophiles. Polyiodoorganic compounds are sometimes employed as X-ray contrast agents, in fluoroscopy, a type of medical imaging. This application exploits the X-ray absorbing ability of the heavy iodine nucleus.Formula: C7H3F2IO2

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

Ligand-enabled β-C-H arylation of α-amino acids without installing exogenous directing groups was written by Chen, Gang;Zhuang, Zhe;Li, Gen-Cheng;Saint-Denis, Tyler G.;Hsiao, Yi;Joe, Candice L.;Yu, Jin-Quan. And the article was included in Angewandte Chemie, International Edition in 2017.Application In Synthesis of 4-Iodo-1,2-dimethoxybenzene This article mentions the following:

Herein we report acid-directed β-C(sp³)-H arylation of α-amino acids enabled by pyridine-type ligands. This reaction does not require the installation of an exogenous directing group, is scalable, and enables the preparation of Fmoc-protected (Fmoc = 9-fluorenylmethoxycarbonyl) unnatural amino acids in three steps. The pyridine-type ligands are crucial for the development of this new C(sp³)-H arylation. In the experiment, the researchers used many compounds, for example, 4-Iodo-1,2-dimethoxybenzene (cas: 5460-32-2Application In Synthesis of 4-Iodo-1,2-dimethoxybenzene).

4-Iodo-1,2-dimethoxybenzene (cas: 5460-32-2) belongs to iodide derivatives. Organoiodine compounds occur widely in organic chemistry, but are relatively rare in nature. Organoiodine lubricants can be used with titanium, stainless steels, and other metals which tend to seize up with conventional lubricants: organoiodine lubricants can be used in turbines and spacecraft, and as a cutting oil in machining.Application In Synthesis of 4-Iodo-1,2-dimethoxybenzene

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

A Novel Approach to Access Aryl Iodides and Disulfides via Dehydrazination of Arylhydrazines and Arylsulfonylhydrazides was written by Balgotra, Shilpi;Kumar Verma, Praveen;Kour, Jaspreet;Gupta, Sorav;Vishwakarma, Ram A.;Sawant, Sanghapal D.. And the article was included in ChemistrySelect in 2018.Safety of 4-Iodo-1,2-dimethoxybenzene This article mentions the following:

The direct iodination of arylhydrazines was achieved using I₂ and KOAc in excellent yields. In addition, disulfides were synthesized from arylsulfonylhydrazides in high yields using same catalytic system. The advantageous feature of the present protocol is the exclusion of transition metal catalyst from the reaction for dehydrazination. A number of labile functionalities remain intact during the reaction. In the experiment, the researchers used many compounds, for example, 4-Iodo-1,2-dimethoxybenzene (cas: 5460-32-2Safety of 4-Iodo-1,2-dimethoxybenzene).

4-Iodo-1,2-dimethoxybenzene (cas: 5460-32-2) belongs to iodide derivatives. Organic iodides are widely used in organic synthesis. Halogenation of aromatic hydrocarbons is a very important reaction via an electrophilic aromatic substitution. The C–I bond is the weakest of the carbon–halogen bonds. These bond strengths correlate with the electronegativity of the halogen, decreasing in the order F > Cl > Br > I.Safety of 4-Iodo-1,2-dimethoxybenzene

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

Efficient Asymmetric Synthesis of Biologically Important Tryptophan Analogues via a Palladium-Mediated Heteroannulation Reaction was written by Ma, Chunrong;Liu, Xiaoxiang;Li, Xiaoyan;Flippen-Anderson, Judith;Yu, Shu;Cook, James M.. And the article was included in Journal of Organic Chemistry in 2001.HPLC of Formula: 220185-63-7 This article mentions the following:

A novel and concise synthesis of optically active tryptophan derivatives was developed via a palladium-catalyzed heteroannulation reaction of substituted o-iodoanilines with an internal alkyne. The required internal alkyne I was prepared in greater than 96% diastereomeric excess via alkylation of the Schollkopf chiral auxiliary, 3,6-diethoxy-2R-isopropyl-2,5-dihydropyrazine with Me₃SiCCCH₂OP(:O)(OPh)₂. Similarly, alkyne II was obtained from the alkylation of 3,6-diethoxy-2S-isopropyl-2,5-dihydropyrazine by TMSCCCH₂OP(:O)(OPh)₂. I was used as an intermediate in the palladium-catalyzed heteroannulation reaction to afford L-tryptophan analogs, whereas II afforded D-tryptophan analogs. Using this strategy, the first asym. syntheses of L-isotryptophan (III) and L-benz[f]tryptophan (IV) were realized. In addition, the optically pure Et 6-methoxy-D-tryptophanate (V) was prepared by this protocol on a large scale (>300 g). An improved total synthesis of tryprostatin A (VI) was accomplished in 43% overall yield employing this palladium-mediated process. In the experiment, the researchers used many compounds, for example, 4,5-Dichloro-2-iodoaniline (cas: 220185-63-7HPLC of Formula: 220185-63-7).

4,5-Dichloro-2-iodoaniline (cas: 220185-63-7) belongs to iodide derivatives. In general, organic iodides are light-sensitive and turn yellow during storage, owing to the formation of iodine. Polyiodoorganic compounds are sometimes employed as X-ray contrast agents, in fluoroscopy, a type of medical imaging. This application exploits the X-ray absorbing ability of the heavy iodine nucleus.HPLC of Formula: 220185-63-7

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

Synthesis of 4-[3,4-di-(2,3,4-tri)methoxyphenyl]benzo[e]-1,2-oxaphosphorines was written by Aniskin, A. S.;Nemtarev, A. V.;Baranov, D. S.;Vasilevskii, S. F.;Mironov, V. F.. And the article was included in Russian Journal of General Chemistry in 2015.Related Products of 5460-32-2 This article mentions the following:

In this work, the behavior of 2,2,2-trichlorobenzo-1,3,2-dioxaphospholes in the reactions with 3,4-dimethoxy-2,3,4-trimetoxyphenylacetylenes containing several donor substituents was studied with the aim to develop a convenient method for the synthesis of polymethoxylated areno-1,2-oxaphospholes. In the experiment, the researchers used many compounds, for example, 4-Iodo-1,2-dimethoxybenzene (cas: 5460-32-2Related Products of 5460-32-2).

4-Iodo-1,2-dimethoxybenzene (cas: 5460-32-2) belongs to iodide derivatives. Iodide-containing intermediates are common in organic synthesis, because of the easy formation and cleavage of the C–I bond. Organoiodine lubricants can be used with titanium, stainless steels, and other metals which tend to seize up with conventional lubricants: organoiodine lubricants can be used in turbines and spacecraft, and as a cutting oil in machining.Related Products of 5460-32-2

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

Cationic palladium(II)-catalyzed synthesis of 2-substituted 3-hydroxymethylbenzo[b]furans was written by Wang, Huan;Han, Xiuling;Lu, Xiyan. And the article was included in Synlett in 2011.Electric Literature of C6H4BrIO This article mentions the following:

A tandem reaction involving an intramol. oxypalladation of an alkyne and an addition to the carbonyl group to quench the carbon-palladium bond to complete the catalytic cycle was developed. The reaction of 2-alkynylphenols with aldehydes to prepare substituted 3-(hydroxymethyl)benzofurans in one pot is described. E.g, reaction of 2-(phenylethynyl)phenol and p-nitrobenzaldehyde, catalyzed by [Pd(dppp)(H₂O)₂](BF₄)₂, gave 90% benzofuran (I). The reaction was catalyzed with the cationic palladium(II) species without the necessity of a redox system. In the experiment, the researchers used many compounds, for example, 4-Bromo-2-iodophenol (cas: 207115-22-8Electric Literature of C6H4BrIO).

4-Bromo-2-iodophenol (cas: 207115-22-8) belongs to iodide derivatives. Organic iodides can be alkyl, alkenyl, or alkynyl, and all of them are very reactive toward with many kinds of nucleophiles. The C–I bond is the weakest of the carbon–halogen bonds. These bond strengths correlate with the electronegativity of the halogen, decreasing in the order F > Cl > Br > I. This periodic order also follows the atomic radius of halogens and the length of the carbon-halogen bond.Electric Literature of C6H4BrIO

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

Neurotropic and psychotropic agents. LXVII. 9-Chloro-10-(4-methylpiperazino)-10,11-dihydrodibenzo[b,f]thiepin and some related synthetic experiments was written by Sindelar, K.;Kakac, B.;Svatek, E.;Holubek, J.;Rajsner, M.;Metysova, J.;Protiva, M.. And the article was included in Collection of Czechoslovak Chemical Communications in 1974.SDS of cas: 13420-63-8 This article mentions the following:

The title compound (I) was prepared in 9 steps from 1-chloro-4-nitrothioxanthone. The decisive step of the synthesis was the oxidation of 1-chloro-9-methylenethioxanthene (II) with Tl(NO3)3 in MeOH; the principal product was the enol-ether III which was hydrolyzed to 9-chlorodibenzo[b,f]thiepin-10(11H)-one (IV). The by-products of the oxidation reaction were 1-chlorodibenzo-[b,f]thiepin-10(11H)-one, bi[1-chloro-11-methoxy-10,11-dihydrodibenzo[b,f]thiepin-10-yl], bi[1-chlorodibenzo[b,f]thiepin-10-yl], and Me 1-chlorothioxanthene-9-carboxylate. IV was transformed to I via 9-chloro-10-hydroxy-10,11-dihydrodibenzo[b,f]-thiepin and 9,10-dichloro-10,11-dihydrodibenzo[b,f]thiepin. An attempt at cyclization of 2-(2-acetamido-5-chlorophenylthio)-phenylacetic acid with H3PO4 acid in the presence of PhMe gave 2-chloro-5H-dibenzo[b,g]-1,4-thiazocin-6(7H)-one (V) and two other products resulting from interaction of the amide group with PhMe, and assumed to be 2-chloro-6-(4-tolyl)-7H-dibenzo-[b,g]-1,4-thiazocine and 6-[1-(4-tolyl)-1-ethylideneamino]-9-chlorodibenzo[b,f]thiepin-10(11H)-one. In the experiment, the researchers used many compounds, for example, 2-Chloro-6-iodobenzoic acid (cas: 13420-63-8SDS of cas: 13420-63-8).

2-Chloro-6-iodobenzoic acid (cas: 13420-63-8) belongs to iodide derivatives. Organoiodine compounds occur widely in organic chemistry, but are relatively rare in nature. Polyiodoorganic compounds are sometimes employed as X-ray contrast agents, in fluoroscopy, a type of medical imaging. This application exploits the X-ray absorbing ability of the heavy iodine nucleus.SDS of cas: 13420-63-8

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

Difluorocarbene-Based Cyanation of Aryl Iodides was written by Zhang, Yin-Xiang;Xiao, Xuan;Fu, Zhi-Hong;Lin, Jin-Hong;Guo, Yu;Yao, Xu;Cao, Yu-Cai;Du, Ruo-Bing;Zheng, Xing;Xiao, Ji-Chang. And the article was included in Synlett in 2020.Quality Control of 3-Iodobenzo[b]thiophene This article mentions the following:

Herein, a difluorocarbene-based cyanation of aryl iodides promoted by a cheap copper source, Cu(NO₃)₂·2.5H₂O, under an air atm is reported. Difluoromethylene phosphobetaine (Ph₃P⁺CF₂CO₂^–), an easily available and shelf-stable difluorocarbene reagent, and NaNH₂ are used as the carbon source and the nitrogen source for the nitrile group, resp. The cyanation protocol is attractive because no toxic reagent is used and performing the reactions under an air atm. is operationally convenient. In the experiment, the researchers used many compounds, for example, 3-Iodobenzo[b]thiophene (cas: 36748-88-6Quality Control of 3-Iodobenzo[b]thiophene).

3-Iodobenzo[b]thiophene (cas: 36748-88-6) belongs to iodide derivatives. In general, organic iodides are light-sensitive and turn yellow during storage, owing to the formation 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.Quality Control of 3-Iodobenzo[b]thiophene

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

Epiquinamide: A Poison That Wasn’t from a Frog That Was was written by Fitch, Richard W.;Sturgeon, Gordon D.;Patel, Shaun R.;Spande, Thomas F.;Garraffo, H. Martin;Daly, John W.;Blaauw, Richard H.. And the article was included in Journal of Natural Products in 2009.Name: 1-Chloro-4-iodobutane This article mentions the following:

In 2003, we reported the isolation, structure elucidation, and pharmacol. of epiquinamide (1), a novel alkaloid isolated from an Ecuadoran poison frog, Epipedobates tricolor. Since then, several groups, including ours, have undertaken synthetic efforts to produce this compound, which appeared initially to be a novel, β2-selective nicotinic acetylcholine receptor agonist. Based on prior chiral GC anal. of synthetic and natural samples, the absolute structure of this alkaloid was established as (1S,9aS)-1-acetamidoquinolizidine. We have synthesized the (1R*,9aS*)-isomer (epi-epiquinamide) using an iminium ion nitroaldol reaction as the key step. We have also synthesized ent-1 semisynthetically from (-)-lupinine. Synthetic epiquinamide is inactive at nicotinic receptors, in accord with recently published reports. We have determined that the activity initially reported is due to cross-contamination from co-occurring epibatidine in the isolated material. In the experiment, the researchers used many compounds, for example, 1-Chloro-4-iodobutane (cas: 10297-05-9Name: 1-Chloro-4-iodobutane).

1-Chloro-4-iodobutane (cas: 10297-05-9) belongs to iodide derivatives. Organic iodides are organic compounds containing a carbon-iodine (C-I) bond. The carbon-iodine bond is weaker than other carbon-halogen bonds due to the poor electronegative nature of the iodine atom. The C–I bond is the weakest of the carbon–halogen bonds. These bond strengths correlate with the electronegativity of the halogen, decreasing in the order F > Cl > Br > I. This periodic order also follows the atomic radius of halogens and the length of the carbon-halogen bond.Name: 1-Chloro-4-iodobutane

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

New Indolo[3,2-b]indole based small organic molecules for Organic Thin Film Transistors (OTFTs): A combined experimental and DFT Study was written by Puli, Venkat Swamy;Subburu, Mahesh;Bhongiri, Yadagiri;Tripathi, Anuj;Prasad, K. R. S.;Chatterjee, Anindita;Pola, Someshwar;Chetti, Prabhakar. And the article was included in Journal of Molecular Structure in 2021.Application of 220185-63-7 This article mentions the following:

Synthesis of new indolo[3,2-b]indoles in presence of Ag-doped ZnO and (Diacetoxyiodo) benzene system under visible-light were reported. All the new fused linear heterocyclic indolo[3,2-b]indole systems thoroughly characterized by spectroscopic methods like mass, UV-visible, NMR and C, H, N elemental anal. Further, their photophys. properties were carried out by combined exptl. and theor. studies. Thermogravimetric studies were carried out to confirm the thermal stability of mols. The frontier MOs of mols. were characterized with the help of cyclic voltammetry. Addnl., the compounds of series 5 were used for the fabrication of organic thin-film transistors, which indicated the hole mobilities in the range of 0.11 – 0.85 cm²/Vs and with on/off ratio 10⁵ on ODTS-SiO₂ substrate at 50°C and are also supported by DFT studies. In the experiment, the researchers used many compounds, for example, 4,5-Dichloro-2-iodoaniline (cas: 220185-63-7Application of 220185-63-7).

4,5-Dichloro-2-iodoaniline (cas: 220185-63-7) belongs to iodide derivatives. In general, organic iodides are light-sensitive and turn yellow during storage, owing to the formation of iodine. The C–I bond is the weakest of the carbon–halogen bonds. These bond strengths correlate with the electronegativity of the halogen, decreasing in the order F > Cl > Br > I.Application of 220185-63-7

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