作者:Huan Tian、Caleb W. Holyoke、Fraser F. Fleming
DOI:10.1021/acs.orglett.2c03461
日期:2022.12.2
(E)- and (Z)-isocyanoalkenes were selectively synthesized via the sequential cross coupling of vinyl iodides with formamide, followed by dehydration. The optimal catalyst, generated in situ from CuII and trans-N,N′-dimethyl-1,2-cyclohexanediamine, rapidly coupled (E)- or (Z)-vinyl iodides with formamide, which minimized the isomerization of the resultant vinyl formamide. The method efficiently provided
( E )-和( Z )-异氰基烯烃是通过乙烯基碘与甲酰胺的顺序交叉偶联,然后脱水选择性合成的。最佳催化剂由 Cu II和反式-N,N'-二甲基-1,2-环己二胺原位生成,可将 ( E )-或 ( Z )-乙烯基碘与甲酰胺快速偶联,从而最大程度地减少生成物的异构化乙烯基甲酰胺。该方法有效地提供了一系列无环、碳环和杂环异氰基烯烃;非对映体异氰基抗生素 B371 和E -B371 的选择性立体发散合成说明了其多功能性。