作者:Haruki Niwa、Kazuto Kunitani、Tomohiro Nagoya、Kiyoyuki Yamada
DOI:10.1246/bcsj.67.3094
日期:1994.11
Described is a short-step synthesis of optically active yamataimine, a 12-membered pyrrolizidine alkaloid of retronecine type. Methyl (1S,5R)-5-methyl-2-oxocyclopentanecarboxylate derived from (R)-(+)-pulegone was converted into the necic acid component required for the synthesis of yamataimine, in a nine-step sequence. Regioselective coupling of (+)-retronecine with the necic acid component via tin-mediated
描述了旋光性山泰明的短步合成,这是一种 12 元吡咯里西啶型生物碱。衍生自 (R)-(+)-pulegone 的 (1S,5R)-5-methyl-2-oxocyclopentanecarboxylate 甲酯被转化为合成山泰胺所需的尼克酸成分,分为九步。(+)-retronecine 与 necic acid 组分通过锡介导的区域选择性酰化随后大环内酯化的区域选择性偶联导致 (+)-yamataimine 的第一次合成。