Dimerization of 2-alkyl-6-methyl-4H-1,3-thiazin-4-ones
Abstract
Two unusual modes of dimerization of 2-alkyl-6-methyl-4H-1,3-thiazin-4-ones were observed; one gave the linearly combined dimers (3) and the other led to the novel spiro-compound (4); the structure of one of the spiro-compounds (4a) was confirmed by X-ray crystallography.