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.
denitrogenative and desulfinative addition of arylsulfonyl hydrazides with nitriles has been successfully achieved under mild conditions. This transformation is a new method for the addition reaction to nitriles with arylsulfonyl hydrazides as arylating agent, thus providing an alternative synthesis of aryl ketones. The reported addition reaction is tolerant to many common functional groups, and works
TBAI/K<sub>2</sub>S<sub>2</sub>O<sub>8</sub>Initiated Radical Cyclization to Synthesize<i>β</i>- Arylsulfonyl Naphthalenes from Homopropargylic Alcohols and Sulfonyl Hydrazides
作者:Xiaodong Yang、Lianbiao Zhao、Bingxiang Yuan、Zhenjie Qi、Rulong Yan
DOI:10.1002/adsc.201700634
日期:2017.9.18
metal‐free radical addition method for the synthesis of β‐arylsulfonyl naphthalenes with homopropargylic alcohols and sulfonyl hydrazides has been developed. In this reaction, sulfonyl hydrazide is employed as the source of sulfonyl radical to produce the desired sulfone directly. There is the first example for homopropargylic alcohol through direct intramolecular addition of vinyl radical to arenes
开发了一种金属自由基加成法,用高炔丙醇和磺酰肼合成β-芳基磺酰基萘。在该反应中,使用磺酰肼作为磺酰基的来源,以直接生产所需的砜。第一个例子是通过由TBAI / K 2 S 2 O 8反应系统引发的乙烯基与磺酰基基团直接向芳烃中分子内加成乙烯基炔醇,并以中等收率产生所需的产物。
Palladium-catalyzed C-3 desulfitative arylation of indolizines with sodium arylsulfinates and arylsulfonyl hydrazides
efficiently prepared by direct C-3 arylation of indolizines using sodium arylsulfinates and arylsulfonylhydrazides. Pd-catalyzed desulfitative C-3 arylation with sodium arylsulfinates was achieved with the assistance of peroxides, and the catalytic efficiency was promoted by N-containing ligands. Arylsulfonylhydrazides were also successfully applied in Pd-catalyzed desulfitative C-3 arylation with indolizines