3-deoxy-20-secoebelin-2-en-20-oic acid lactone 20-(4-nitrophenyl) ester 在
chromium(VI) oxide 作用下,
以
溶剂黄146 为溶剂,
反应 1.0h,
以29.4%的产率得到(1'S,2'S,4'aS,4'bS,8'aS,10'aR)-3',4,4',4'a,4'b,5,5',8,8'a,9',10',10'a-dodecahydro-4'b,8',8',10'a-tetramethyl-5,5'-dioxospiro[furan-3(2H),1'(2'H)-phenanthrene]-2'-carboxylic acid 4-nitrophenyl ester