Access to 27-Nortomatidine and 27-Norsoladulcidine Derivatives
作者:Dorota Czajkowska-Szczykowska、Alejandro Corona Díaz、Grzegorz Aleksiejczuk、Yliana López Castro、Jacek W. Morzycki
DOI:10.1021/acs.joc.9b00103
日期:2019.4.5
Synthesis of (22R)- and (22S)-27-norspirosolane alkaloids from tigogenin, epismilagenin, and smilagenin is described. The alkaloids were prepared from readily available dinorcholanic lactones via their reaction with 4-chlorobutyllithium followed by substitution of chloride with azide and reductive N-cyclization under the Staudinger conditions.