Recent Advances in the Synthesis of Heterocycles via Reactions Involving Elemental Sulfur

Abstract

It is well known that heterocycles are among the most significant molecules for everyday life, ranging from natural products and bioactive substances to functional materials. This review will focus on the synthesis of heterocycles by reactions involving elemental sulfur published from 2017 until now.

The synthesis of N,N′-disulfanediyl-bis(N′-((E)-benzylidene)acetohydrazide) from (E)-N′-benzylideneacetohydrazide and S8

“…On basis of these preliminary studies and previous reports, [21][22][23][24][25][26][27][28] a plausible pathway for the preparation of 2a from (E)-N 0 -benzylideneacetohydrazide is proposed in (Scheme 3). Initially, Ag 2 CO 3 react with 1 to produce the intermediate (A).…”

Research Progress in C—S Bond Formation Reaction of Olefins with Organic Sulfur Reagents under Photocatalyst-Free and Non-Electrochemical Conditions

“…事实上, 推而广之, 针对烯烃等底物, 近年来一些 基于无机硫源(如 S 8 [159] 、 AgSCF 3 [160][161] 和焦亚硫酸钠 [162] 等)的有机合成研究也日益活跃. 但限于篇幅, 本文暂 时未能逐一展开综述.…”

Elemental sulphur in the synthesis of sulphur-containing polymers: reaction mechanisms and green prospects

“…Although there are a number of reviews dedicated to various aspects of the synthesis of sulphur-containing polymers and low-molecular-weight heterocyclic compounds, 2,27,[62][63][64][65][66][67] until present there have been no studies examining the inclusion of S 8 into macromolecules from both the reaction mechanisms viewpoint and in the context of the opportunities for green development of this area of research. Therefore, the present review looks into the reaction mechanisms that lead to the inclusion of elemental sulphur into polymers and discusses the opportunities for the implementation of such processes under conditions that comply with the principles of green chemistry.…”