Double 1,4-addition of (thio)salicylamides/thiosalicylic acids with propiolate derivatives: a direct, general synthesis of diverse heterocyclic scaffolds
ring-closure procedure to prepare a range of diverse heterocycles has been developed. In this transformation, a variety of substituted (thio)salicylamides and thiosalicylicacids occured double 1, 4-additions reaction with propiolate derivatives in the presence of inorganic base (K3PO4), as a result, benzothiazinones, benzoxazinones and benzoxathiinones were prepared in good to excellent yields respectively
Microsporum gypseum. Structure‐activity relationships of antimycobacterial activity and antifungal activity against T. mentagrophytes and M. gypseum were analyzed by the Free‐Wilson method. An increase in antimycobacterial activity was observed only for the sulfanylbenzoic acid derivatives, especially those with the benzyl moiety. The antifungal activity was not significant.
Copper-Catalyzed Intramolecular N–S Bond Formation by Oxidative Dehydrogenative Cyclization
作者:Zhen Wang、Yoichiro Kuninobu、Motomu Kanai
DOI:10.1021/jo401056g
日期:2013.7.19
Copper-catalyzed synthesis of benzo[d]isothiazol-3(2H)-ones and N-acyl-benzothiazetidine by intramolecular dehydrogenative cyclization is described. In this reaction, a new nitrogen–sulfur (N–S) bond is formed by N–H/S–H coupling. The present reaction has high functional group tolerance and gives products in gram scale. This method promotes double cyclization, allowing for synthesis of a drug intermediate
描述了铜通过分子内脱氢环化反应合成苯并[ d ]异噻唑-3(2 H)-酮和N-酰基-苯并噻唑烷的方法。在该反应中,通过NH / S-H偶联形成一个新的氮-硫(NS)键。本反应具有较高的官能团耐受性,并得到以克为单位的产物。该方法促进了双环化,从而允许合成药物中间体。
Electrochemical synthesis for benzisothiazol-3(2H)-ones by dehydrogenative N S bond formation
Herein, we report an electrochemical method for the synthesis of benzisothiazol-3(2H)-ones from 2-mercaptobenzamides. The electrochemical reaction proceeds through intramolecular NH/SH coupling cyclization reaction by generating H2 as the nonhazardous side product. Moreover, the developed procedure is highly advantageous due to its short reaction time, mild conditions and wide substrate scope without
在此,我们报告了一种从 2-巯基苯甲酰胺合成苯并异噻唑-3(2H)-酮的电化学方法。电化学反应通过分子内 N H/S H 偶联环化反应进行,生成 H 2作为无害副产物。此外,该方法反应时间短,条件温和,底物范围广,无需使用金属催化剂和外源性氧化剂。2009 Elsevier Ltd. 版权所有。
Synthesis of 1,2-Benzisothiazolin-3-one by Transamination of Sulfenamides
N-Substituted sulfenamoylbenzoates were synthesized by transamination of N-unsubstituted sulfenamoylbenzoates with amines. The reaction did not always proceed by simple amine exchange between the amines and ammonia on thesulfur atom of the sulfenamides. In reactions with aliphatic amines, the sulfenamides cyclized to form N-substituted1,2-benzisothiazolin-3-ones. The synthesis of 1,2-benzisothiazolin-3-ones