Zg. Aliev et al., Synthesis and crystal structure of dimethyl 2-benzoyl-2-ethyl-3-phenylcyclopropane-1,1-dicarboxylate, RUSS CHEM B, 49(12), 2000, pp. 2072-2073
The reaction of alpha,alpha -dibromobutyrophenone with dimethyl benzylidene
malonate in the presence of zinc gives dimethyl 2-benzoyl-2-ethyl-3-phenylc
yclopropane-1,1-dicarboxylate as a single geometrical isomer. Its structure
was determined by X-ray diffraction analysis.