1, 3-Dipolar cycloaddition is one of the important chemical reactions between a 1, 3-dipole
and a dipolarophile to construct a five-membered heterocyclic compound. As an available α …

Pyrazolones are a class of heterocyclic compounds that contain a pyrazole ring fused to a
ketone group. Recent scientific research has focused extensively on the potential anti …

Regioselectivity of (3+2) cycloaddition of azomethine ylides to activated olefins in the synthesis
of spiro[oxindole-3,2′-pyrrolidine] derivatives | SpringerLink Skip to main content …

A series of dispiro [indoline-3, 2′-pyrrolidine-3′, 3 ″-indolines] was synthesized via a
multicomponent polar [3+ 2] cycloaddition (32CA) reaction of isatin derivatives, sarcosine …

An unprecedented and efficient three-component 1, 3-dipolar cycloaddition reaction using
(E)-2-(benzo [d] thiazol-2-yl)-3-(aryl) acrylonitriles 4a–g and an in situ generated azomethine …

A series of novel formazan analogs 4 a–e, having MeO, Me, Cl, NO2 at para/meta‐position
in 1‐phenyl ring was synthesized by treatment of 9‐fluorenone hydrazone 2 with a series of …

The regio-and stereochemical polar [3+ 2] cycloaddition of azomethine ylides, which were
generated in situ by the reaction of isatin and sarcosine or benzylamine, with (E)-3-aryl-1 …

Enantiomerically enriched bispiro [γ‐butyrolactone‐pyrrolidin‐4, 4′‐pyrazolone] skeletons
were synthesized firstly through a simple organocatalytic 1, 3‐dipolar cycloaddition reaction …

A simple, convenient, and regioselective 1, 3-dipolar cycloaddition of 9-diazo-9 H-fluorene
or diphenyldiazomethane to 2-arylidene-1 H-indene-1, 3 (2 H)-diones afforded a series of …

An efficient and catalyst-free multicomponent sequence for synthesizing fused new
polyheterocyclic pyrene-grafted dispiro-pyrrolidine oxindolines through 1, 3-dipolar …