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.
Wittig Ylide Mediated Decomposition of <i>N</i>-Sulfonylhydrazones to Sulfinates
作者:Deepika Choudhary、Vineeta Khatri、Ashok K. Basak
DOI:10.1021/acs.orglett.7b03953
日期:2018.4.6
N-Sulfonylhydrazones generate sulfinates selectively when treated with a stabilized Wittig ylide in a polar aprotic solvent at elevated temperature. The transition metal and base free decomposition method is applicable to N-sulfonylhydrazones generated from a number of aromatic and heteroaromatic aldehydes and ketones. In the case of N-tosylhydrazones derived from O-allyl and O-propargyl salicylaldehydes
Copper-Catalyzed Aerobic Oxidative Reaction of Sulfonyl Hydrazides with Alcohols: An Easy Access to Sulfinates
作者:Bingnan Du、Zan Li、Ping Qian、Jianlin Han、Yi Pan
DOI:10.1002/asia.201501262
日期:2016.2
A Cu‐catalyzed aerobicoxidativereaction between sulfonylhydrazides and alcohols has been developed. In this reaction, sulfonylhydrazides act as the sulfinic acid precursors to react with alcohols, resulting in sulfinic esters with up to 72 % yield. This catalytic system tolerates a wide range of sulfonylhydrazide substrates, and represents a new strategy for the transformation of readily available
Reaction of alcohols with sodium arenesulfinates could afford either sulfones or sulfinates, and O‐attack of sulfinate anions onto in situ generated carbocation intermediates from alcohols was the previous proposed mechanism in many syntheses of sulfinates. This concept, which is often used consciously or unconsciously, was revised herein by using isotopic labeling experiments and development of an
Silyloxymethanesulfinate as a sulfoxylate equivalent for the modular synthesis of sulfones and sulfonyl derivatives
作者:Dae-Kwon Kim、Hyun-Suk Um、Hoyoon Park、Seonwoo Kim、Jin Choi、Chulbom Lee
DOI:10.1039/d0sc02947e
日期:——
protocol for the modular synthesis of sulfones and sulfonyl derivatives has been developed utilizing sodium tert-butyldimethylsilyloxymethanesulfinate (TBSOMS-Na) as a sulfoxylate (SO22−) equivalent. TBSOMS-Na, easily prepared from the commercial reagents Rongalite™ and TBSCl, serves as a potent nucleophile in S-alkylation and Cu-catalyzed S-arylation reactions with alkyl and aryl electrophiles. The sulfone