Category: iodides-buliding-blocks

Mitra, Sudha Sumi published the artcilePolyhalide derivatives of poly[N-(2-aminoethyl)acrylamido]triethylammonium resins as iodinating reagents, Application In Synthesis of 105752-04-3, the main research area is polyacrylamide ammonium polyhalide iodinating reagent preparation; aryl amine iodination polyacrylamide ammonium polyhalide; phenol iodination polyacrylamide ammonium polyhalide; regioselective iodinating reagent aromatic amine phenol; iodo arene preparation.

Poly[N-(2-aminoethyl)acrylamido]triethylammonium dichloroiodate, tetrachloroiodate, and dibromoiodate resins are useful for selective iodination of aromatic amines and phenols. The influence of the various reaction parameters including nature of the solvent, effective molar concentration of the reagent, and temperature were investigated to find out optimum reaction conditions for achieving selectivity for monoiodination.

Macromolecular Chemistry and Physics published new progress about Aryl halides Role: SPN (Synthetic Preparation), PREP (Preparation). 105752-04-3 belongs to class iodides-buliding-blocks, name is 4-Iodo-3-nitroaniline, and the molecular formula is C6H5IN2O2, Application In Synthesis of 105752-04-3.

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

Wang, Liu-Gang published the artcileThieme chemistry journal awardees – where are they now? Synthesis of p-phenylene ethynylene based macrocycles and bimacrocycle through formation of the imine bond, Recommanded Product: 4-Iodo-2-nitrophenol, the main research area is aryl amine aromatic aldehyde imination macrocyclization; macrocyclic phenylene ethynylene imine preparation.

The synthesis of 3 monomacrocycles and 1 bimacrocycle from 2 para-phenylene ethynylene frameworks was described. For 2 of the monomacrocycles, the 2 frameworks were linked by an amide unit, and the macrocyclization involved the intramol. formation of 1 imine bond. For another monomacrocycle and the bimacrocycle, the frameworks contained 2 and 3 NH2 or CHO units, resp., and the macrocyclization involved the intermol. formation of 2 and 3 imine bonds, resp..

Synlett published new progress about Aromatic hydrocarbons, aryl alkynes Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 21784-73-6 belongs to class iodides-buliding-blocks, name is 4-Iodo-2-nitrophenol, and the molecular formula is C6H4INO3, Recommanded Product: 4-Iodo-2-nitrophenol.

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

Sun, Zhenhua published the artcileSyntheses of Pyridine C-Nucleosides as Analogues of the Natural Nucleosides dC and dU, Safety of 6-Fluoro-5-iodopyridin-2-ol, the main research area is hydrogen bond pyridine nucleoside synthesis palladium catalyst coupling; pyridine C nucleoside synthesis Heck palladium catalyst coupling.

The syntheses of four pyrimidine C-nucleosides are described. These derivatives are designed as mimics of dC and dU, and in that respect, each can form two hydrogen bonds with complementary dG or dA residues. The minor groove O2 carbonyl in each derivative is replaced by a fluorine or a Me group. The key carbon-carbon bond connecting the heterocycle to the carbohydrate is formed using a Heck-type palladium-mediated coupling reaction.

Journal of Organic Chemistry published new progress about Coupling reaction. 884660-48-4 belongs to class iodides-buliding-blocks, name is 6-Fluoro-5-iodopyridin-2-ol, and the molecular formula is C5H3FINO, Safety of 6-Fluoro-5-iodopyridin-2-ol.

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

Mothes, Celine published the artcileAmino-zinc-ene-enolate cyclization: A short access to cis-3-substituted prolino-homotryptophane derivatives, Category: iodides-buliding-blocks, the main research area is proline substituted asym synthesis amino zinc enolate cyclization AZEE; prolinohomotryptophane chimera asym synthesis AZEE cyclization; enolate cyclization transmetalation iodination protection Negishi cross coupling indole.

Proline chimeras are useful tools for medicinal chem. and/or biol. applications. The asym. synthesis of cis-3-substituted prolines can be easily achieved via amino-zinc-ene-enolate cyclization followed by transmetalation of the cyclic zinc intermediate for further functionalization. Syntheses of prolino-homotryptophane derivatives were achieved through Negishi cross-coupling of the zinc intermediate with indole rings. The use of Pd catalyst derived from Fu’s [(t-Bu3)PH]-BF4 was required to avoid the undesired β-hydride elimination. Optically pure and orthogonally protected compounds were obtained readily usable for peptide synthesis.

Journal of Organic Chemistry published new progress about Cross-coupling reaction (Negishi). 1048039-49-1 belongs to class iodides-buliding-blocks, name is tert-Butyl 5-chloro-3-iodo-1H-indole-1-carboxylate, and the molecular formula is C13H13ClINO2, Category: iodides-buliding-blocks.

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

Qiu, Zhenjiang published the artcileRegioselective α-benzylation of 3-iodoazetidines via Suzuki cross-coupling, Computed Properties of 939759-26-9, the main research area is benzyl azetidine preparation regioselective; iodoazetidine benzylboronic acid pinacol ester benzylation Suzuki palladium catalyst.

An efficient protocol for the synthesis of α-benzyl azetidines I [R = 4-F3COC6H4, 2-F-C6H4, naphthalen-2-yl, etc.; R1 = C(O)OCH2C6H5, C(O)OC(CH3)3] starting from benzylboronic acid pinacol ester derivatives II and 3-iodoazetidine III was developed. A wide range of α-benzyl azetidine derivatives I was obtained in moderate to good yields with high regioselectivity (>99%).

Tetrahedron Letters published new progress about Benzylation catalysts (regioselective). 939759-26-9 belongs to class iodides-buliding-blocks, name is Benzyl 3-iodoazetidine-1-carboxylate, and the molecular formula is C11H12INO2, Computed Properties of 939759-26-9.

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

Parmar, Dixit published the artcileIron catalysed cross-couplings of azetidines – application to the formal synthesis of a pharmacologically active molecule, Formula: C11H12INO2, the main research area is iron catalyzed coupling azetidine Grignard reagent; azetidine pharmacol active agent preparation CNS disorder.

A protocol for the coupling of 3-iodoazetidines with Grignard reagents in the presence of an iron catalyst has been developed. A variety of aryl, heteroaryl, vinyl and alkyl Grignards were shown to participate in the coupling process to give the products in good to excellent yields. Furthermore, a short formal synthesis towards a pharmacol. active mol. was shown.

Chemical Communications (Cambridge, United Kingdom) published new progress about Central nervous system disease. 939759-26-9 belongs to class iodides-buliding-blocks, name is Benzyl 3-iodoazetidine-1-carboxylate, and the molecular formula is C11H12INO2, Formula: C11H12INO2.

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

Song, Gui-Ting published the artcileSynthesis of monofluorooxazoles with quaternary C-F centers through photoredox-catalyzed radical addition of methylene-2-oxazolines, Application In Synthesis of 63131-30-6, the main research area is monofluorooxazole quaternary carbon fluorine center preparation; bromo fluoro oxoarylpropionate preparation methylene oxazoline radical addition photocatalyst.

A novel photoredox-catalyzed radical addition of methylene-2-oxazolines I (R = Ph, hexyl, cyclohexyl, thiophen-2-yl, etc.) has been developed under visible light irradiation to synthesize monofluorooxazoles II (R1 = Ph, furan-2-yl, 3-methylphenyl, etc.) with a quaternary carbon center using 2-bromo-2-fluoro-3-oxo-3-phenylpropionates R1C(O)C(F)(Br)C(O)OEt as radical source. This method with a simple protocol, scalability and high yield offers a facile path to get diverse monofluorinated oxazoles II with quaternary C-F centers, which are a class of highly valuable motifs and synthons.

Organic & Biomolecular Chemistry published new progress about Photochemical redox reaction. 63131-30-6 belongs to class iodides-buliding-blocks, name is Ethyl 3-(4-iodophenyl)-3-oxopropanoate, and the molecular formula is C11H11IO3, Application In Synthesis of 63131-30-6.

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

Wang, Lei published the artcileEffect of the 3-halo substitution of the 2′-deoxy aminopyridinyl-pseudocytidine derivatives on the selectivity and stability of antiparallel triplex DNA with a CG inversion site, SDS of cas: 25391-56-4, the main research area is deoxyaminopyridinyl pseudocytidine halo derivative antiparallel triplex DNA CG inversion; Antiparallel triplex DNA; Artificial nucleoside analogue; Inversion site; Non-natural type triplex DNA.

Triplex formation against a target duplex DNA has the potential to become a tool for genome research. However, there is an intrinsic restriction on duplex DNA sequences capable of forming the triplex DNA. Recently, we demonstrated the selective formation of the stable antiparallel triplexes containing CG inversion sites using a 2′-deoxy-1-methylpseudocytidine derivative (ΨdC), whose amino group was conjugated with the 2-aminopyridine at its 5-position as an addnl. H-bonding unit (AP-ΨdC). The 1-N position of 2-aminopyridine was supposed to be protonated to form the H-bond with the guanine of the CG inversion site. Here, to test the effect of the 3-substitution of the 2-aminopyridine unit of AP-ΨdC on triplex stability, we synthesized 3-halogenated 2-aminopyridine derivatives of AP-ΨdC. The pKa values of the 1-N position of the 2-aminopyridine unit of AP-ΨdC as the monomer nucleoside were determined to be 6.3 for 3-CH3 (MeAP-ΨdC), 6.1 for 3-H (AP-ΨdC), 4.3 for 3-Cl (ClAP-ΨdC), 4.4 for 3-Br (BrAP-ΨdC), and 4.7 for 3-I (IAP-ΨdC), suggesting that all of the halogenated AP-ΨdCs are not protonated under neutral conditions. Interestingly, although the recognition selectivity depends on the sequence context, the triplex-forming oligodeoxyribonucleotides (TFOs) having the sequence of the 3′-G-(IAP-ΨdC)-A-5′ context showed selective triplex formation with the CG inversion site. These results suggest that the protonation at the 1-N position plays an important role in the stable and selective triplex formation of AP-ΨdC derivatives in any sequences.

Bioorganic & Medicinal Chemistry published new progress about GC content. 25391-56-4 belongs to class iodides-buliding-blocks, name is 3-Iodo-5-nitropyridin-2-amine, and the molecular formula is C5H4IN3O2, SDS of cas: 25391-56-4.

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

Schlosser, Manfred published the artcileThe reactivity of 2-fluoro- and 2-chloropyridines toward sodium ethoxide: Factors governing the rates of nucleophilic (het)aromatic substitutions, Synthetic Route of 685517-67-3, the main research area is reactivity fluoropyridine chloropyridine sodium ethoxide nucleophilic aromatic heteroaromatic substitution.

The relative displacement rates of the halide substituent from 2-fluoro- and 2-chloropyridines by EtONa in EtOH at +25° were assessed by competition kinetics. The 2-fluoropyridine reacts 320 times faster than the chloro analog. A CF3 group increases the reactivity more than single halogen atoms do, whatever the element, and the latter are superior to Me3Si groups. Substituents accommodated at the 4-position operate through their inductive effect, whereas at the 3-position, this action may be attenuated by steric hindrance. Almost all 5-substituents enhance the rate of the nucleophilic substitution occurring at the 2-position. The sole exception concerns the F-atom at the 5-position which retards the reaction, presumably by lone-pair/lone-pair repulsion with the neg. charge building up at the central C-atom of the intermediate Meisenheimer complex. The substituent effects are additive. Therefore, by using the increments derived from the present work, the rates of future reactions should be predictable with fair accuracy.

Helvetica Chimica Acta published new progress about Ethoxylation kinetics. 685517-67-3 belongs to class iodides-buliding-blocks, name is 2,6-Difluoro-3-iodopyridine, and the molecular formula is C5H2F2IN, Synthetic Route of 685517-67-3.

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

Pierre, Romain published the artcileNovel library synthesis of 3,4-disubstituted pyridin-2(1H)-ones via cleavage of pyridine-2-oxy-7-azabenzotriazole ethers under ionic hydrogenation conditions at room temperature, SDS of cas: 884494-51-3, the main research area is disubstituted pyridinone preparation kinase inhibitor; 7-azabenzotriazole; hinge-binder; ionic hydrogenation; library; pyridine-2(1H)-one.

A novel complementary multiparallel synthetic routes permitting the exploitation of the C-3 then C-4 vectors or vice versa to deliver library of novel 3,4-disubstituted pyridin-2(1H)-one kinase inhibitors I [R = (CH2)3OCH3, Ph, 2-EtC6H4, etc.; R1 = 4-NH2C6H10, CH2C(Me)2CH2NH2, cyclohexyl, etc.; R2 = H; R1R2 = CH2CH2OCH2CH2] starting from readily-available 2-chloro-4-fluoronicotinic acid and 2-fluoro-4-iodonicotinic acid resp. was developed. Perhaps the highlight of library route development was the novel transformation to the desired pyridin-2(1H)-one motif via in situ formation of the C2-OAt ether during HATU coupling and its cleavage under ionic hydrogenation conditions at just room temperature

Beilstein Journal of Organic Chemistry published new progress about Enzyme inhibitors (kinase). 884494-51-3 belongs to class iodides-buliding-blocks, name is 2-Fluoro-4-iodonicotinic acid, and the molecular formula is C6H3FINO2, SDS of cas: 884494-51-3.

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