G. V. Pshenichnyi, V. A. Mashenkov
Sep 1, 1992
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Journal
Chemistry of Heterocyclic Compounds
Abstract
The corresponding oxazolo[5,4-c]pyridines were obtained in the reaction of stereoisomeric 1-benzyl-3-hydroxy-3-methyl-6-phenyl-4-piperidines with potassium thiocyanate in acetic acid and rearranged into 6-benzyl-5,6,7,8-tetrahydro-1-methyl-3-thioxo-7-phenyloxazolo[3,4-c]pyrimidine by boiling in o-xylene. It was shown that the rearrangement is reversible.