F. Giordano et al., X-RAY-ANALYSIS OF METHYL 6,6-TETRAMETHOXYBICYCLO[2.2.0]HEXANE-1-CARBOXYLATE OBTAINED BY REACTION OF METHYL PROPIOLATE AND 1,1-DIMETHOXYETHENE, Gazzetta chimica italiana, 124(5), 1994, pp. 209-211
The reaction of methyl propiolate with a great excess of 1,1-dimethoxy
ethene led to methyl 6,6-tetramethoxybicyclo[2.2.0]hexane-1-carboxylat
e whose crystal structure was determined. This X-ray determination rep
resents the first X-ray analysis of a bicyclo[2.2.0]hexane derivative.