First asymmetric synthesis of pyrrolizidine alkaloids, (+)-hyacinthacine B1 and (+)-B2
作者:Tetsuya Sengoku、Yasutaka Satoh、Manami Oshima、Masaki Takahashi、Hidemi Yoda
DOI:10.1016/j.tet.2008.06.078
日期:2008.8
An enantiomerically and diastereomerically pure route has been developed for the first asymmetric synthesis of (1S,2R,3R,5R,7aR)- and (1S,2R,3R,5S,7aR)-1,2-dihydroxy-3,5-dihydroxymethylpyrrolizidine, hyacinthacine B1 and B2, featuring efficient and stereodefined elaboration via the asymmetric dihydroxylation (AD) of the functionalized homochiral pyrrolidine derivative prepared from (S)-(−)-2-pyrrolidone-5-carboxylic
已开发出用于(1 S,2 R,3 R,5 R,7a R)-和(1 S,2 R,3 R,5 S,7a R)-的第一个不对称合成的对映体和非对映体纯路线1,2-二羟基-3,5-二羟基甲基吡咯烷啶,葫芦碱B 1和B 2,具有通过(S)-(-)-2-吡咯烷酮制备的功能化高手性吡咯烷衍生物的不对称二羟基化(AD)进行高效和立体定义的修饰-5-羧酸。