A unique strategy toward the synthesis of polysubstituted indolizines has been developed. When 2-pyridinyl-2-(2′-bromoallyl)-1-carboxylates were treated with Cs2CO3, the starting material went through a methylenecyclopropane ring formation/opening cascade, and the corresponding indolizines were obtained in moderate to good yield as a single regioisomer.
已经开发了合成多取代的吲哚嗪的独特策略。当用Cs 2 CO 3处理2-吡啶基-2-(2'-溴烯丙基)-1-羧酸盐时,起始原料经过亚甲基环丙烷成环/开环级联反应,得到相应的吲哚嗪类化合物,收率中等至良好。一个单一的区域异构体。
63. Aminoalkyl tertiary carbinols and derived products. Part VIII. Some 1-alkyl- and 1 : 2-cycloalkano-pyrrocolines