4-methyl-5-oxohexanal 、
(2S)-N-[2-(cyclohexen-1-yl)ethyl]-1-[2-[(2R,3R,6S)-6-[(2S,3E,5E,7E,9S,11R)-2,13-dimethoxy-3,9,11-trimethyl-12-oxotrideca-3,5,7-trienyl]-2-hydroxy-3-methyloxan-2-yl]-2-oxoacetyl]piperidine-2-carboxamide 在
lithium diisopropyl amide 作用下,
以
四氢呋喃 为溶剂,
以8%的产率得到(2S)-N-[2-(cyclohexen-1-yl)ethyl]-1-[2-[(2R,3R,6S)-2-hydroxy-6-[(2S,3E,5E,7E,9S,11R)-14-hydroxy-2,13-dimethoxy-3,9,11,17-tetramethyl-12,18-dioxononadeca-3,5,7-trienyl]-3-methyloxan-2-yl]-2-oxoacetyl]piperidine-2-carboxamide