Structures of some of the minor alkaloids of Cephalotaxus fortunei
作者:William W. Paudler、Jerry McKay
DOI:10.1021/jo00951a040
日期:1973.6
Preparation and antitumor activity of a rearranged ester of cephalotaxine
作者:Kenneth L. Mikolajczak、Richard G. Powell、Cecil R. Smith
DOI:10.1021/jm00235a014
日期:1975.1
Cephalotaxus alkaloids, a "rearranged" ester (2b) of cephalotaxine was prepared, one which is an isomer of deoxyharringtonine (5a). The parent alkaloid, cephalotaxine (1a), was allowed to react with thionylchloride to replace its hydroxyl group with chlorine. The resulting chloro compound 1b, on treatment with the silver salt of half ester 6, yielded 2b via an allylicrearrangement followed by further double