136806-18-3Relevant academic research and scientific papers
New synthetic approach to [1]benzopyrano[4,3-b]pyridin-5-one derivatives
Beccalli, Egle M.,Contini, Alessandro,Trimarco, Pasqualina
, p. 3447 - 3449 (2004)
A new synthesis of [1]benzopyrano[4,3-b]pyridin-5-ones 4 was developed starting from 3-formyl-coumarin N-functionalized amidines 3. The reaction is based likely on the intramolecular cyclocondensation of the C-α amidinic carbanion in basic medium on the f
Substituted coumarin amidines: Useful building blocks for the preparation of [1]benzopyrano[4,3-b]pyridin-5-one and [1]benzopyrano[4,3-d]pyrimidin-5-one derivatives
Beccalli, Egle M.,Contini, Alessandro,Trimarco, Pasqualina
, p. 4957 - 4964 (2007/10/03)
The synthesis of [1]benzopyrano[4,3-b]pyridin-5-ones 4a-f and 4g-j starting from 3-formylcoumarin and 3-cyanocoumarin N-functionalized amidines 3a-f and 3g-j, respectively, was reported. The ring-closure reaction mechanism, under basic or acidic media, wa
