Buy article online - an online subscription or single-article purchase is required to access this article.
organic compounds
The condensation reaction of the mesitonitrile oxide with 2-methyl-3,5-bis(methylthio)-7-phenyl-1,2,4-triazepine is peri and regioselective. The 1,3-dipolar cycloaddition occurs in a unique way on the C=C double bond of the 1,2,4-triazepine and leads to the title compound, C22H22N4OS. The isoxazole ring is planar while the triazepine ring adopts a boat conformation.