异丁醛 、
[(2S,3S,6S)-6-[(2R,3R)-2-(tert-Butyl-dimethyl-silanyloxy)-3-(4-methoxy-benzyloxy)-butyl]-2-[1,1-dimethyl-2-(1-methyl-1H-imidazole-2-sulfonyl)-ethyl]-2-methoxy-3-trimethylsilanyloxy-tetrahydro-pyran-(4E)-ylidene]-acetic acid 在
lithium diethylamide 作用下,
以
四氢呋喃 为溶剂,
生成 (6-[2-(
tert-butyl-dimethyl-silanyloxy)-3-(4-methoxy-benzyloxy)-butyl]-2-{2-[4-(1-hydroxy-2-methyl-propyl)-1-methyl-1
H-imidazole-2-sulfonyl]-1,1-dimethyl-ethyl}-2-methoxy-3-trimethylsilanyloxy-tetrahydro-pyran-4-ylidene)-acetic acid