The unprecedented Friedländer reaction of densely functionalized 2-amino-3-cyano-4H-
pyrans (1) with cyclohexanone has afforded in one step and good yield 5-amino-4-aryl-3 …

Publisher Summary The class of 2-amino-4H-pyrans has been known for several decades.
Most of the 2-amino-4H-pyrans are colorless, pale-yellow, or pale-cream crystals with high …

The main purpose of this review is to present a literature survey on the reactivity of 8-
hydroxyquinoline and its derivatives toward α-cyanocinnamonitrile or ethyl α …

Background: Arylidenemalononitriles are valuable synthons for the construction of a variety
of novel complex heterocyclic motifs, fused heterocycle derivatives, and spirocyclic …

New 2, 7-disubstituted 5-amino-6, 8-dicyano-2, 3-dihydro-3-oxo thiazolo [3, 2-a] pyridines
have been prepared. Their cyclization with formamide, nitrous acid and triethylorthoformate …

Ce–Zr loaded on SiO2 as catalyst provides an extremely efficient method to synthesize
pyranoquinolines. This catalyst is found to be superb for the three-component synthesis of …

Treatment of kojic acid and triacetic acid lactone with arylmethylenemalononitrile derivatives
in the presence of piperidine in ethanol, respectively, furnished the corresponding amino …

Nano silica phosphoric acid (nano-SPA) as a recoverable solid catalyst was prepared by the
reaction of nano silica chloride with phosphoric acid. The structure of the prepared solid acid …

A novel 2-amino-4-(8-quinolinol-5-yl)-1-(p-tolyl)-pyrrole-3-cabonitrile (2) was obtained by
the reaction of 2-[2-bromo-1-(8-hydroxyquinolin-5-yl)-ethylidene]-malononitrile (1) with p …

The new 2-amino-3-R-4-aryl-6-ethyl-4, 6-dihydropyrano [3, 2-c][2, 1] benzothiazine 5, 5-
dioxides were synthesized via three-component interaction of 1H-2, 1-benzothiazin-4 (3H) …