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Paper | Regular issue | Vol 24, No. 10, 1986, pp.2871-2877
Published online, 1st January, 1970
DOI: 10.3987/R-1986-10-2871
Synthesis of 4,5-Dihydro-1H-imidazoles from 1,5-Dihydro-2H-imidazoles Using ‘Nickel Boride’

Melvin R. Euerby, Amanda C. Oldroyd, and Roger D. Waigh*

*Department of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, U.K.


In situ prepared ‘nickel boride’ generated from sodium borohydride and nickel (II) chloride cleanly transforms 1,5-dihydro-2H-imidazoles into 4,5-dihydro-1H-imidazoles in high yields by a double bond migration.