(2E)-5-bromo-2-[(4-chlorophenyl)methylidene]-3H-inden-1-one 、
buta-2,3-dienoic acid benzyl ester 在
(S,S)-1,1'-bis(trimethylsilyl)-2,2'-(2-cyclohexyl-2-phospha-1,3-propanediyl)ferrocene 作用下,
以
甲苯 为溶剂,
反应 20.0h,
生成 benzyl 5'-bromo-5-(4-chlorophenyl)-1'-oxo-1',3'-dihydrospiro[cyclopent-2-ene-1,2'-indene]-2-carboxylate 、 benzyl 5'-bromo-5-(4-chlorophenyl)-1'-oxo-1',3'-dihydrospiro[cyclopent-2-ene-1,2'-indene]-2-carboxylate