(R)-acetyl-5-(tert-butyldimethylsilyloxymethyl)-4-methoxy-1H-pyrrol-2(5H)-one 、 (E,7S)-N-[(2Z)-2-(chloromethylidene)-4-oxobutyl]-7-methoxy-N-methyltetradec-4-enamide 在
四氯化钛 、
N,N-二异丙基乙胺 作用下,
以
二氯甲烷 为溶剂,
以364 mg的产率得到E,(7S)-N-{(2Z)-(chloromethylene)-4-hydroxy-6-oxo-[(5R)-(tert-butyldimethylsilyloxymethyl)-4-methoxy-2-oxo-1H-pyrrol-1(5H)-yl]hexyl}-7-methoxy-N'-methyltetradec-4-enamide