Thermolysis of Taxinine and Taxinine H. Allylic Rearrangement of the Ester Moiety in the C-Ring.
作者:Hikokazu SUZUKI、Magoichi SAKO、Kosaku HIROTA
DOI:10.1248/cpb.46.1314
日期:——
Thermolysis of taxinine and taxinine H, esters of 2α, 9α, 10β-triacetoxy-8β, 12, 15α, 15β-tetramethyl-4-methylene-13-oxotricyclo[9.3.1.03, 8] pentadec-11-en-5α-ol, resulted in the smooth formation of the corresponding 4-en-4-ylmethanol esters and the 4(20), 5-diene by virtue of migration and elimination of the 5-O-ester moiety, thus providing useful methods for chemical modifications of the C-ring in taxinine derivatives.
2α, 9α, 10β-triacetoxy-8β, 12, 15α, 15β-tetramethyl-4-methylene-13-oxotricyclo[9.3.1.03,8] 十五-11-烯-5α-醇,通过 5-O-酯分子的迁移和消除,顺利形成相应的 4-烯-4-基甲醇酯和 4(20),5-二烯,从而为紫杉素衍生物中 C 环的化学修饰提供了有用的方法。