An efficient three-component domino or one-pot strategy has been developed for the synthesis of medicinally important benzothiophene and benzothiopheno[2,3-e]azepinedione derivatives for the first time. Amine-promoted selective cleavage of C–S bond of thioisatin is the key step in this process. The reported methodology benefits from environmentally friendly solvent (H2O), wide substrate scope, good
首次开发了一种有效的三组分多米诺骨牌或一锅法,用于合成具有医学重要性的苯并噻吩和苯并噻吩[2,3- e ]氮杂二酮衍生物。胺促进的硫代丝氨酸的C–S键选择性裂解是该过程的关键步骤。报告的方法得益于环保溶剂(H 2 O),较宽的底物范围,良好的官能团耐受性和较高的反应产率。
Transformation of Benzo[b]thiophene-2, 3-diones to Functionalised Diaryldisulfides
作者:Ramchand T. Pardasani、Saurabh Singh、Johnson George、Rahul Joshi、T. Vaidyanathan Sundar
DOI:10.2174/1570178611310050010
日期:2013.5.1
A facile synthesis of symmetric diaryldisulfides in 55-75% yield by nucleophilic ring opening of
benzo[b]thiophene-2,3-diones is described.
A new Darzens reaction of thioisatins and sulfonium salts has, for the first time, been reported. This reaction allows efficient access to thiochromenone derivatives in good to excellent yields under mild reaction conditions. The substrate scope includes both electron-withdrawing and electron-donating groups on both the thioisatins and sulfonium salts. Moreover, some of the synthesized thiochromenone
Selective Synthesis of Benzothiophene‐Fused Polycyclic, Eight‐Membered N‐Heterocycles via Amine‐Mediated Three‐Component Domino Strategy
作者:Qingsong Deng、Aimin Yu、Lei Zhang、Xiangtai Meng
DOI:10.1002/adsc.202001129
日期:2021.2.16
to synthesize benzothiophene‐fused polycyclic, eight‐membered N‐heterocycles via a three‐component dominoreaction of thioisatins under catalyst‐free conditions. The reaction between tryptamine, thioisatin, and bromoacetophenone produced benzothiophene‐fused polycyclic compounds. In contrast, using D‐tryptophan methyl ester hydrochloride instead of tryptamine afforded benzothiophene‐fused eight‐membered