Y(NO3)3.6H2O catalyzed Four-Component Reaction for the Synthesis of Highly Functionalized Pyrano[2,3-c]pyrazoles in Aqueous Medium

Abstract

An efficient one-pot four-component protocol for the synthesis of pyrano[2,3-c]pyrazole<br />derivatives has been demonstrated using Y(NO3)3.6H2O as catalyst under mild condition. This is<br />a general synthetic protocol which could be applicable to a wide range of carbonyl compounds<br />including aromatic aldehydes, isatins and acenaphthenequinone. All The reactions proceeded<br />smoothly, high-yielding and purity via an easy work-up procedure.<br /><br />