Oxidation of ylide precursors to vicinal tricarbonyls. Applications in vincamine alkaloid synthesis.
作者:Harry H. Wasserman、Gee-Hong Kuo
DOI:10.1016/s0040-4020(01)88248-x
日期:——
Attachment of carbethoxyalkyl residues to an α,β-diketo ester provides dielectrophilic species applicable to the synthesis of the vincamine alkaloids, eburnamonine and tacamonine. The required vicinal tricarbonyl aggregates were formed by oxidation of suitable ylide precursors with ozone or singlet oxygen.
乙氧羰基烷基残基与α,β-二酮酯的连接提供了适用于长春胺生物碱,金枪鱼碱和他卡莫宁合成的介电物质。通过用臭氧或单线态氧氧化合适的叶立德前体形成所需的邻位三羰基聚集体。