Synthesis and reactions of 5-acetyl-2-amino-3-cyano-4-(5-X-2-furyl)-6-methyl-4H-pyrans

Š Marchalín, D Ilavský, J Kováč…

Index: Marchalin, Stefan; Ilavsky, Dusan; Kovac, Jaroslav; Bruncko, Milan Collection of Czechoslovak Chemical Communications, 1990 , vol. 55, # 3 p. 718 - 727

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Citation Number: 16

Abstract

Abstract Substituted 2-amino-4-(5-X-2-furyl)-4H-pyrans IIIa-IIIe have been prepared by a cyclization reaction of 5-X-2-furylmethylenepropanedinitriles IIa-IIe with 2, 4-pentanedione. In reaction of 3-(5-X-2-furyl)-methylene-2, 4-pentanediones Ia-Ie with propanedinitrile the formation of 4H-pyrans IIIa-IIIe is accompanied, depending on the catalyst type, by the formation of 5-X-2-furylmethylenepropanedinitriles IIa-IIe. 2-(4-Methylbenzylideneamino)- ...