One-Pot Synthesis of 6-Alkyl-4-amino-2-bromopyridine-3,5-dicarbonitriles
摘要:
A one-pot procedure has been proposed for the synthesis of 6-alkyl-4-amino-2-bromopyridine-3,5- dicarbonitriles by reaction of malononitrile dimer with aliphatic aldehyde, followed by heterocyclization and oxidation with a hydrogen bromide/bromine mixture.
Three-component condensation of aliphatic aldehydes with resorcinol and malononitrile dimer (2-aminoprop-1-ene-1,1,3-tricarbonitrile) afforded the corresponding 5-alkyl-2,4-diamino-8-hydroxy-5H-chromeno[2,3-b]pyridine-3-dicarbonitriles.
Double heteroannulation reactions of 1-naphthol with alkyl- and arylmethylidene derivatives of malononitrile dimer
作者:Ivan N. Bardasov、Anastasiya U. Alekseeva、Denis L. Mihailov、Oleg V. Ershov、Dmitry A. Grishanov
DOI:10.1016/j.tetlet.2015.02.081
日期:2015.4
The synthesis of 7H-benzo[7,8]chromeno[2,3-b]pyridine derivatives from the reactions of arylmethylidene derivatives of malononitrile dimer with 1-naphthol is described. (C) 2015 Elsevier Ltd. All rights reserved.