作者:David Gagnon、Claude Spino
DOI:10.1021/jo9009497
日期:2009.8.21
We describe the synthesis of (+)-aspidofractinine, the enantiomer of a naturally occurring alkaloid of the kopsane family. Key features of the synthesis include a stereospecific cyanate to isocyanate rearrangement on a chiral scaffold, a ring-closing alkene metathesis to cleave the chiral auxiliary, and a chemoselective cyclopropanation to introduce the quaternary carbon at position 7 of aspidofractinine
我们描述了(+)-aspidofractinine的合成,这是自然的kopsane家族生物碱的对映异构体。合成的关键特征包括在手性支架上将立体特异性氰酸酯重排成异氰酸酯,闭环的烯烃复分解以裂解手性助剂,以及化学选择性的环丙烷化以将季碳原子引入Aspidofractinine的7位。