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- W2087614992 abstract "Novel routes for the preparation of 2-amino-4 H -pyran-3-carbonitrile 9 , amino-arylbenzoic acid ester derivatives 13a , b , 2-aminotetrahydro-4 H -chromene-3-carbonitrile 18 , 3-amino-4-cyanotetrahydronaphthalene-2-carboxylic acid ester 26 and 4-amino-3,5-dicyanophthalic acid ester derivatives 37a–c were developed. The synthetic methods utilize one-pot reactions of acetylene carboxylic acid esters, α,β-unsaturated nitriles and/or active methylenenitriles in the presence of L-proline or DABCO. Plausible mechanisms are suggested for the formation of the products. Finally, these compounds were used for the efficient synthesis of 6-amino-5-cyanonicotinic acid ester derivatives 31a , b , ethyl 4-amino-5 H -pyrano[2,3- d ]pyrimidine-6-carboxylates 33a , b , 4-amino-6 H -pyrrolo[3,4- g ]quinazoline-9-carbonitrile 39 , and 1,7-diamino-6-( N '-hydroxycarbamimidoyl)-3-oxo-5-phenyl-3 H -isoindole-4-carboxylate ( 40 )." @default.
- W2087614992 created "2016-06-24" @default.
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- W2087614992 date "2014-01-14" @default.
- W2087614992 modified "2023-10-14" @default.
- W2087614992 title "Organobase-catalyzed three-component reactions for the synthesis of 4H-2-aminopyrans, condensed pyrans and polysubstituted benzenes" @default.
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- W2087614992 doi "https://doi.org/10.3762/bjoc.10.11" @default.
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