(3R,4R)-3-(1,3-dioxolan-2-yl)-3,4-dimethyl-2-oxo-cyclohexanecarbonitrile 、 (E)-5-(tert-Butyl-diphenyl-silanyloxy)-pent-3-en-2-one 在
四氢吡咯 作用下,
以
甲苯 为溶剂,
生成 (1S,2R,4aR,5R)-5-(tert-Butyl-diphenyl-silanyloxymethyl)-1-[1,3]dioxolan-2-yl-1,2-dimethyl-7-oxo-1,3,4,5,6,7-hexahydro-2H-naphthalene-4a-carbonitrile 、
(1S,2R,4aR,5S)-5-(tert-Butyl-diphenyl-silanyloxymethyl)-1-[1,3]dioxolan-2-yl-1,2-dimethyl-7-oxo-1,3,4,5,6,7-hexahydro-2H-naphthalene-4a-carbonitrile