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Abstract
1‐Butyl‐3‐methylimidazolium chloroaluminate, [bmim]Cl·.AlCl3 (molar fraction, N=0.67), ionic liquid has been used in combination with metallic Zn for the reductive coupling of carbonyl compounds to synthesize symmetrical olefins, with the Z‐isomer formed predominantly. The ionic liquid played a dual role of Lewis acid catalyst and solvent.
Acknowledgment
The authors gratefully acknowledge G. K. Trivedi for his valuable suggestions and the Department of Science and Technology for financial assistance. S. V. B. and N. B. D. are thankful to the Council of Scientific and Industrial Research, New Delhi, for the awards of junior research fellowships.