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Review: 115 refs. [ABSTRACT FROM AUTHOR]

Title compounds are conveniently and efficiently synthesized by the reaction of chalcones (I) and ammonium acetate or via one-pot three-component condensation of aromatic aldehydes with acetophenones (IV) and ammonium acetate. [ABSTRACT FROM AUTHOR]

Starting from diethyl 2-aminomalonate or α-aryl aminoesters and aryl, hetaryl, or alkyl aldehydes azomethine ylides are generated which are transformed in situ via chemoselective [3 + 3] cycloaddition with quinone monoimides to form dihydrobenzoxazines in high yields. [ABSTRACT FROM AUTHOR]

A diagram is presented which shows the regio-specific synthesis of 2,3-disubstituted indoles from the unusual formal 1,2-addition of pyrazolones to 3-indolylmethanols.

The article presents chemical equations for an article related to the Enantioselective Construction of Spiro[indoline-3,2′-pyrrole] via Catalytic Asymmetric 1,3-Dipolar Cycloadditions Using Allenes by C.-S. Wang and others, published in the "Journal of Organic Chemistry" in 2015.

The catalyst can be reused nine times with excellent results. [ABSTRACT FROM AUTHOR]

The first organocatalytic asymmetric inverse-electron-demand 1,3-dipolar cycloaddition of the title imines (I) is described. [ABSTRACT FROM AUTHOR]

The reaction is performed in water, and the catalyst can be reused in six runs with only a slight loss of activity. [ABSTRACT FROM AUTHOR]

Azomethine ylides undergo cycloadditions via SPINOL-derived chiral phosphoric acid-catalyzed pseudo four-component reactions of aldehydes and aminomalonates, resulting in the stereoselective construction of chiral imidazolidine scaffolds with two stereogenic centers. [ABSTRACT FROM AUTHOR]

For the first time the enantioselective cycloaddition of isatin-derived 3-indolylmethanol is presented realized by an unprecedented formal [3 + 3] cycloaddition of azomethine ylide instead of the common [3 + 2] cycloaddition. [ABSTRACT FROM AUTHOR]