Selective construction of 2-substituted benzothiazoles from o-iodoaniline derivatives S8 and N-tosylhydrazone via a copper-promoted [3 + 1 + 1]-type cyclization reaction has been realized. In the protocol, the carbon atom on N-tosylhydrazone could be regulated to construct benzothiazole by changing the reaction system. Furthermore, the transformation has achieved the construction of multiple carbon-heteroatom
S8-Mediated Cyclization of Bis(2-aminophenyl) Disulfide/Diselenide with Arylacetylenes/Styrenes: Access to 2-(Arylmethyl)-1,3-benzothiazoles/benzoselenazoles
作者:Hongli Wu、Haifeng Gan、Caojian Feng、Lihuan Zhao、Mengru Cao
DOI:10.1055/a-1665-8562
日期:2022.1
A novel S8-mediatedapproach to benzothiazoles/benzoselenazoles from bis(2-aminophenyl) disulfides/diselenides and phenylacetylenes or styrenes has been developed. 2-(Arylmethyl)-1,3-benzoselenazoles were comprehensively synthesized for the first time. The reactions proceeded in moderate to excellent yields, and with a gram-scale application.
La synthèsedespiropyrannesphotochromes substitués en position 3 montre que la méthode de cyclisation classique est limitée dans certains cas, notamment pour les composés multifonctionnels ou lorsque les anhydrobases intermeAdiaires sont peu réactives; elle constitue en mêmo temps une généralisation de la synthèse en série benzothiazolinique. Les nouveaux substrats obtenus sont intéressants pour
Manganese‐Mediated Reductive Alkylation of Thiazolyl‐Phosphonium Salts
作者:Mengwan Yang、Jiaxi Fang、Huan Liu、Xinyao Lu、Jiawen Zhou、Zehuai Mou、Huifei Wang
DOI:10.1002/adsc.202300159
日期:2023.6.13
Reductive functionalization reactions between two electrophiles is a straightforward protocol to access carbon-carbon bonds without use of organometallic reagents prepared in advance. Here, we developed a manganese-mediated reductivealkylation of heterocyclic thiazolyl-phosphonium salts with benzyl bromides to form C2-alkylated benzothiazoles. The reaction features a broad substrate scope, high-functional-group