Rhodium-Catalyzed Isomerization and Alkyne Exchange Reactions of 1,4-Dithiins via the 1,2-Ethenedithiolato Rhodium Complex
作者:Mieko Arisawa、Kyosuke Sawahata、Takuya Ichikawa、Masahiko Yamaguchi
DOI:10.1021/acs.organomet.8b00498
日期:2018.9.24
Rhodium-catalyzed isomerization and alkyne exchange reactions of 1,4-dithiines occurred by cleavage of two C–S bonds. The 2,5- and 2,6-disubstituted 1,4-dithiins underwent isomerization reactions in toluene at 110 °C, providing equilibrium mixtures of isomers. At 150 °C, the reaction of 1,4-dithiins and dimethyl acetylenedicarboxylate gave unsymmetric 2,3-di(methoxycarbonyl)-1,4-dithiins and 2,3-d
铑催化的1,4-二乙酮的异构化和炔烃交换反应是通过两个C-S键的断裂而发生的。2,5-和2,6-二取代的1,4-二硫辛在甲苯中于110°C进行异构化反应,提供了异构体的平衡混合物。在150°C下,1,4-二硫辛和乙炔二羧酸二甲酯反应生成不对称的2,3-二(甲氧羰基)-1,4-二硫辛和2,3-二(甲氧羰基)噻吩,后者是由1,4-二硫精脱硫。炔烃和1,2-二硫杂环丁烷的相关反应得到2,3-二(甲氧基羰基)噻吩。这些反应被认为涉及1,2-乙二硫醇基铑中间体。