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Abstract
Treatment of the diazo diones 1a–i with a catalytic amount of titanium(IV) chloride furnished regioselectively the bicyclo[n.m.0]alkanediones 3a–i in very good yields.
ACKNOWLEDGMENTS
This research was supported in part by the Department of Science and Technology, New Delhi. We thank Dr. P. K. Ghosh, Director, and R. V. Jasra, Head of the Division, for their encouragement shown in this work. S. A. B. and C. G. wish to acknowledge the CSIR for a fellowship.