A method for the electrochemical synthesis of sulfinic esters by aerobicoxidative coupling of thiophenols and alcohols has been developed. Using electrons as the redox reagent and O2 in air as the oxygen source, the reactions proceeded smoothly at room temperature, even for a gram-scale preparation. No use of catalyst, clean redox reagent, green and abundant oxygen source, and mild reaction conditions
Electrochemical synthesis of sulfinic esters from alcohols and thiophenols
作者:Yang He、Jinli Zhang、Liang Xu、Yu Wei
DOI:10.1016/j.tetlet.2020.151631
日期:2020.3
Electrochemical oxidative couplings between S–H and O–H bonds are achieved herein directly from readily-available alcohols and thiophenols, affording a series of diverse sulfinic esters. This strategy can take advantage of 6 equivalents of alcohol, relative to thiophenol, to achieve moderate to good yields, without the assistance of any metallic catalysts, bases, and additional oxidants.
We have developed a protocol for the NaHSO3‐promoted esterification of sulfonyl hydrazides with alcohols for the synthesis of sulfinicesters. Various sulfonyl hydrazides could be converted to the corresponding sulfinicesters in good to high yields. The merits of this protocol include mild transition‐metal‐free reaction conditions, an inexpensive and available reagent, and operational simplicity.
isoquinolin-1(2H)-ones at the C-4 position is reported by employing ethyl sulfinates, and the corresponding products are obtained in moderate to excellent yields in the presence of iodine. This synthetic strategy provides a range of thioether-isoquinolin-1(2H)-ones while tolerating a number of functional groups on the isoquinoline nitrogen atom and benzene ring. In addition, pyridin-2(1H)-one is also reacted
NMR of terminal oxygen. 6—17O NMR of the SO ‘double bond’: Derivatives of arylsulphinic and arylsulphonic acids
作者:Hans Dahn、Vien Van Toan、My-Ngoc Ung-Truong
DOI:10.1002/mrc.1260290907
日期:1991.9
oxygen atoms in esters, anions and amides of substituted arenesulphinic acids and in esters and amides of substituted arenesulphonic acids were measured. The signals of the terminal O appear close to those of the bridge O. Compared with carbonyl O, terminal SO shows (a) a lower sensitivity to the electronic influences of geminal groups, (b) only a low sensitivity to arene ring substituents and (c) small
测量了取代芳烃磺酸的酯、阴离子和酰胺以及取代芳烃磺酸的酯和酰胺中末端氧原子的 17O NMR 谱。末端 O 的信号看起来接近桥 O 的信号。 与羰基 O 相比,末端 SO 显示 (a) 对孪晶基团的电子影响的敏感性较低,(b) 对芳烃环取代基的敏感性较低(c) 小的溶剂效应。根据 π 键特性讨论 C 键和 S 键 O 之间的差异。Dy3+ 与甲基芳烃亚磺酸盐中的 O 端发生络合。