New asymmetric strategy for the total synthesis of naturally occurring (+)-alexine and (−)-7-epi-alexine
作者:Masaki Takahashi、Tetsuya Maehara、Tetsuya Sengoku、Norifumi Fujita、Kunihiko Takabe、Hidemi Yoda
DOI:10.1016/j.tet.2008.03.029
日期:2008.5
A novel and highly convenient process is described for the asymmetric synthesis of polyhydroxylated pyrrolizidine alkaloids, (+)-alexine [(1R,2R,3R,7S,7aS)-3-hydroxymethyl-1,2,7-trihydroxypyrrolizidine] and (−)-7-epi-alexine [(1R,2R,3R,7R,7aS)-3-hydroxymethyl-1,2,7-trihydroxypyrrolizidine], as the potent glycosidase inhibitors by featuring the efficient and stereodefined elaboration of the functionalized
描述了一种不对称合成多羟基吡咯烷核生物碱,(+)-阿雷西汀[(1 R,2 R,3 R,7 S,7a S)-3-羟甲基-1,2,7-三羟基吡咯烷啶]和(-)-7- Epi- alexine [(1 R,2 R,3 R,7 R,7a S)-3-羟甲基-1,2,7-三羟基吡咯烷啶],作为有效的糖苷酶抑制剂,其特征在于官能化的吡咯烷衍生物的有效和立体定义的修饰,而这些吡咯烷衍生物又通过对衍生自1-木糖的高手性烯丙醇前体进行立体选择性操作而制得。