Journal of the American Chemical Society p. 1019 - 1027 (1986)
Update date:2022-07-30
Topics:
LeFevre, Gerard N.
Crawford, Robert J.
Secondary deuterium kinetic isotope effects and product proportions are measured for several methyl-substituted 4-methylene-1-pyrazolines and deuterated isotopomers.The kinetic data support a single-bond-cleavage mechanism, and the products indicate that three modes of ring closure are required.Evidence is presented for a series of monomethyl compounds to suggest that the mechanism is more complex than a two-step scheme would predict and that the interconversion of a series of intermediates 46 is required.
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