Chiral synthesis of the necic acid components, crobarbatic acid and integerrinecic acid lactone
作者:Toshio Honda、Fumihiro Ishikawa、Shin-ichi Yamane
DOI:10.1039/p19960001125
日期:——
Samarium(II) diiodide-promoted regioselective fragmentation of the γ-halogeno esters 12 and 13 afforded the olefins 14 and 20, respectively, which were converted into the necic acid components, crobarbatic acid and a known advanced intermediate of integerrinecic acid lactone, of macropyrrolizidine alkaloids.
二碘化钐(II)促进γ-卤代酯12和13的区域选择性裂解,分别得到烯烃14和20,它们被转化为大环吡咯里西啶的neic酸组分、crobarbatic酸和已知的interinecic酸内酯的高级中间体生物碱。