Revised structures for the adducts of ergosteryl acetate with maleic anhydride
作者:D.Neville Jones、P.F. Greenhalgh、I. Thomas
DOI:10.1016/0040-4020(68)89031-3
日期:1968.1
Revised structures are proposed for four adducts of ergosteryl acetate and maleic anhydride. One is a normal Diels-Alder adduct of endo configuration, in which the dienophilic addition has occurred from the α side. The other three adducts are produced by an addition-abstraction process, with addition at C-7 and concomitant abstraction of either the 9α or the 14α hydrogen to give 7α succinic anhydride