addition of 2-methylcyclopropenyllithium to N-methoxy-N-methylcarboxamides followed by hydrolysis of intermediate cyclopropyl ketone adducts on silica gel. The new method has been applied to the synthesis of cis-jasmone.
A total synthesis of (+)-isovelleral. The absolute configuration of the russulaceae sesquiterpenes
作者:R. Bergman、T. Hansson、O. Sterner、B. Wickberg
DOI:10.1039/c39900000865
日期:——
(+)-Isovelleral, an antibiotic and antifeedant sesquiterpene dialdehyde from Basidiomycetes, has been synthesised via a diastereoselective intramolecular Diels–Alder cyclisation of a chiral intermediate derived from D-ribonolactone.