Maxym V. Vasylyev, Y. Bilokin, Olena V. Branytska
1999
Citations
0
Influential Citations
10
Citations
Journal
Heterocyclic Communications
Abstract
2-(2-Oxo-2H-1-benzopyran-3-yl)-5,6,7,a-tetrahydro-3H-benzo[4,5]thieno[2,3-d]pyrimidin-4-ones (4a.bi have been synthesized via a rearrangement of 2-(A/-3-carbamoyl-4,5,6,7-tetrahydrobenzo[b]thiophen-2-yl) imino-2H-1benzopyran-3-carboxamides (3a.b). The tetrahydrobenzo[ö]thiophenes 3 have been conveniently prepared by the reaction of 2imino-2H-1-benzopyran-3-carboxamides ( l a £ ) with 2-amino-4,5,6,7-tetrahydrobenzo[ö]thiophene-3carboxamide (2) in glacial acetic acid.