Lewis‐Acid‐Catalyzed (3+2)‐Cycloadditions of Donor‐Acceptor Cyclopropanes with Thioketenes
作者:Grzegorz Mlostoń、Mateusz Kowalczyk、André U. Augustin、Peter G. Jones、Daniel B. Werz
DOI:10.1002/ejoc.202100879
日期:2021.12.14
A series of dialkyl 2-methylidene tetrahydrothiophene-3,3-dicarboxylates was prepared from (tert-butyl)iso-propyl thioketene via Lewis acid catalyzed (3+2)-cycloaddition with D-A cyclopropanes. In all studied cases the (Z)-diastereoisomer was found as the main product.
以(叔丁基)异丙基硫烯酮为原料,通过路易斯酸催化与DA环丙烷的(3+2)环加成反应制备了一系列2-亚甲基四氢噻吩-3,3-二羧酸二烷基酯。在所有研究案例中,( Z )-非对映异构体被发现是主要产物。