专利号:US-5530107-A 优先权日:1992-10-15 标 题:Method for making steroidal peracyl glycosides 发明人:ALLAN DOUGLAS J M; BUSCH FRANK R; LAMBERT JOHN F; SHINE RUSSELL J; WALINSKY STANLEY W 权利人:PFIZER 摘要:Processes for the synthesis of tigogenin beta-O-cellobioside heptaalkanoate which is an intermediate for the known hypocholesterolemic agent tigogenin beta-cellobioside. The process comprises reacting α-cellobiosyl bromide heptaalkanoate and β-tigogenin in the presence of zinc fluoride or zinc cyanide under conditions capable of forming said tigogenyl β-O-cellobioside heptaalkanoate. The analogous preparations of hecogenin β-O-cellobioside heptaalkanoate, 11-ketotigogenin β-O-cellobioside heptaalkanoate, and diosgenin β-O-cellobioside heptaalkanoate are also disclosed. The process provides both high β-anomeric selectivity and high yields.
参考文献:10.1073/pnas.1510432112 摘要:Shishido TK, Jokela J, Kolehmainen CT, Fewer DP, Wahlsten M, Wang H, Rouhiainen L, Rizzi E, De Bellis G, Permi P, Sivonen K. Antifungal activity improved by coproduction of cyclodextrins and anabaenolysins in Cyanobacteria. Proc Natl Acad Sci U S A. 2015 Nov 03;112(44):13669–74.