Cationic cyclization reactions of 6-methylhept-5-en-2-one oxime; X-ray crystal structure of 3-isopropylidene-2-methyl-Δ1-pyrroline
Abstract
The heterolytic cleavage of the nitrogen-oxygen bond of 6-methyl-hept-5-en-2-one oxime under various conditions has led to two types of cationic cyclization reactions producing Δ1-pyrrolines whose structures have been proved by 13C n.m.r. spectroscopy and X-ray crystallography.