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Synthesis of Heterocyclic Compounds Using Amidines as Their Ene-1,1-diamine Tautomers, IV: Synthesis of N-Bridged Heterocycles 1,2,3,4-Tetrahydropyrido[1,2-a]pyrimidin-6-ones and Methyl 1,2,3,4-Tetrahydropyrrolo[1,2-a]pyrimidin-7-ylideneacetates

โœ Scribed by Ihara, Shogo; Soma, Takashi; Yano, Daigo; Aikawa, Shunichi; Yoshida, Yasuhiko


Book ID
115520486
Publisher
Taylor and Francis Group
Year
2011
Tongue
English
Weight
205 KB
Volume
41
Category
Article
ISSN
0039-7911

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N-t-Butylacetamidines 1 on heating with methyl vinyl ketone, acrolein or crotonaldehyde gave the 2,3-dihydropyridine derivatives 4, 5 or 6 via N-alkylation of the acetamidines 1. Reaction of amidines 1 with phenyl 1-propenyl ketone, benzalacetone or chalcone gave 3,4-dihydropyridine derivatives 8, 9