Intramolecular steric factors in the thermolysis of 4-alkylidene-1-pyrazolines

GN LeFevre, RJ Crawford

文献索引：LeFevre, Gerard N.; Crawford, Robert J. Journal of the American Chemical Society, 1986 , vol. 108, # 5 p. 1019 - 1027

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被引用次数: 23

摘要

Abstract: 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 ...