The total synthesis of some pyrrolyzidine alkaloids and their absolute configuration
作者:N.K. Kochetkov、A.M. Likhosherstov、V.N. Kulakov
DOI:10.1016/s0040-4020(01)82781-2
日期:1969.1
The number of known pyrrolyzidine alkaloids of the ester type is on the increase (e.g. Leonard1), but their total synthesis, which could finally prove the relative and absolute configuration, has not yet been accomplished. Now we report the first total synthesis of the simplest group of ester alkaloids containing isomeric 1-hydroxymethylpyrrolyzidines as necines, esterified by isomeric 2-isopropyl-2