13C NMR chemical shifts of thiols, sulfinic acids, sulfinyl chlorides, sulfonic acids and sulfonic anhydrides
摘要:
Abstract13C NMR spectra of thiols, sulfinic acids, sulfinyl chlorides, sulfonic acids and sulfonic anhydrides have been obtained. The data are discussed in terms of the additivity of the deshielding effects exerted by the sulfur functionality at the α‐ or β‐position, and the shielding effects produced by the sulfur function at the γ‐position.
From symmetrical tetrasulfides to trisulfide dioxides <i>via</i> photocatalysis
作者:Kai Gong、Yilin Zhou、Xuefeng Jiang
DOI:10.1039/d1gc03242a
日期:——
achieved symmetrical tetrasulfides. Stern–Volmer analysis and radical quenching experiments demonstrated the occurrence of a single electron transfer between the photocatalyst and sulfinic acid. Bioactive molecules such as the antihypertensive drug captopril, allicin derivatives, amino acids and terpenes were efficiently and reversibly linked through sulfur–sulfur covalent bonds. Furthermore, flow-setup syntheses
PROCESSES OF MAKING AND CRYSTALLINE FORMS OF A MDM2 INHIBITOR
申请人:AMGEN INC.
公开号:US20140364455A1
公开(公告)日:2014-12-11
The present invention provides processes for making 2-((3R,5R,6S)-5-(3-chlorophenyl)-6-(4-chlorophenyl)-1-((S)-1-(isopropylsulfonyl)-3-methylbutan-2-yl)-3-methyl-2-oxopiperidin-3-yl)acetic acid as well as intermediates and processes for making the intermediates. Also provided are crystalline forms of the compound and the intermediates.
The reaction of mercaptans with dimethyldioxirane. A facile synthesis of alkanesulfinic acids.
作者:D. Gu、David N. Harpp
DOI:10.1016/s0040-4039(00)60059-x
日期:1993.1
Dimethyldioxirae oxidizes aliphatic thiols to sulfinic acids in very good yield. Benzylic and aromatic thiols give a variety of other oxidation products using DMD.
Acid-Catalyzed Hydrolysis of Some <i>N</i>,<i>N</i>-Dibenzylalkanesulfinamides in 50% Acetonitrile–Water
作者:Mrityunjoy Datta、Alan J. Buglass
DOI:10.1080/10426507.2012.704105
日期:2013.6.1
bimolecular neutral, acid-catalyzed, and acid-dependent nucleophilic (halideion) catalysis pathways. The last-named is predominant in reactions in HBr solutions, but in HCl solutions, the acid-catalyzed pathway is predominant. The results indicate that both steric and electronic effects are important in these reactions. There appears to be no mechanistic switchover in the series 1→4. GRAPHICAL ABSTRACT
摘要 研究了一些 N,N-二苄基链烷亚磺酰胺 (RSONH(CH2Ph)2; 1, R = Me; 2, R = iPr; 3, R = tBu; 4, R = 1-金刚烷基) 50% ( v:v) 氢溴酸和盐酸的乙腈-水溶液,主要在 44.8 °C,使用紫外 (UV) 分光光度法确定伪一级速率常数。发现这些化合物通过同时发生的双分子中性、酸催化和酸依赖性亲核(卤离子)催化途径水解。后一种反应在 HBr 溶液中占主导地位,但在 HCl 溶液中,酸催化途径占主导地位。结果表明空间和电子效应在这些反应中都很重要。在系列 1→4 中似乎没有机械转换。图形概要