Ring transformation of 4-oxo-1,6,7,8-tetrahydro-4H-pyrido[1,2-a]-pyrimidine-3-carboxamide期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Ring transformation of 4-oxo-1,6,7,8-tetrahydro-4H-pyrido[1,2-a]-pyrimidine-3-carboxamide

Authors:	István Hermecz József Engler Zoltán Mészáros Gábor Tóth

Affiliation:	1. CHINOIN Pharm. and Chem. Works, H-1325 Budapest, P.O. Box 110, Hungary;2. Institute for Drug Research H-1325 Budapest P.O. Box 82, Hungary;3. NMR Laboratory of the Institute for General and Analytical Chemistry, Technical University, H-1111 Budapest, Gellért tér 4. Hungary

Abstract:	The title compound / $3$ / may be transformed into the 3-/methylaminomethylene/--2,3,6,7,8,9-hexahydro-4H-pyrido[1,2-a]pyrimidine-2,4-dione / $5$ E, $5$ Z/ which is in equilibrium with the 1,2,3,6,7,8-hexahydro tautomer / $8$ E, $8$ Z/ in DMSO-d₆.

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