The pyran ring system is widely present in the animal and plant kingdom and possesses
diverse pharmacological activities. Pyran is a six-membered oxygen heterocycle with two …

Three component, one-pot synthesis of dihydropyrano[3,2-c]chromene derivatives in the
presence of H6P2W18O62 · 18H2O as a green and recyclable catalyst - ScienceDirect Skip …

Background A straightforward and efficient method for the synthesis of pyrano [2, 3-d]
pyrimidine diones derivatives from the reaction of barbituric acid, malononitrile and various …

Pyrano [2, 3-d]-, pyrido [2, 3-d] pyrimidines and pyrano [3, 2-c] benzopyran have attracted
much attention owing to their biological activities [1]. A number of methods have been …

Full article: Zn[(L)proline]2: An Efficient Catalyst for the Synthesis of Biologically Active
Pyrano[2,3-d]pyrimidine Derivatives Skip to Main Content Taylor and Francis Online homepage …

Abstract Pyrano [2, 3‐d] pyrimidine derivatives were synthesized in high yields by a
condensation reaction between arylmethylidenemalononitrile and barbituric acid using room …

A simple, efficient, and high yielding one-pot protocol for the synthesis of pyrimido [4, 5-b]
quinolines and indeno [2′, 1′: 5, 6] pyrido [2, 3-d] pyrimidines has been developed by …

Eco-friendly synthesis of pyrano [2, 3-d] pyrimidinone derivatives catalyzed by a novel
nanocatalyst of ZnO-supported copper oxide in water is reported. The catalyst is synthesized …

The direct three-component condensation of 6-aminouracil, 6-amino-2-thiouracil or 6-amino-
1, 3-dimethyluracil, with arylaldehydes and malononitrile to generate a series of pyrido [2, 3 …

A novel and facile one‐pot synthesis of spiro cyclic 2‐oxindole derivatives of pyrimido [4, 5‐
b] quinoline‐4, 6‐dione, pyrido [2, 3‐d: 6, 5‐d′] dipyrimidine‐2, 4, 6‐trione, and indeno …