General procedure for synthesis of imidazoles

Similar results are obtained when the oxoketene acetals are heated with a slight excess of nitrosyl chloride in dry diethyl ether-pyridine. Again yields range between 55 and 87% [29]. 

Popilin and G. nshchenko, Chem. Heterocycl. Compd. USSR (FngL Transl.) 8, 1142 (1972). 

Suzuki, S. Maeda, K. Maisumoto, T. Ishizuka and Y. Iwasawa, Chem. Pharm. BulL 34, 3111 (1986). 

van Leusen, F. J. Schaart and D. Van Leusen, Reel. Trav. Chim. Puys-Bus Belg. 98, 258 (1979). 

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