Condensed benzopyrans III. 3H,4H[1] benzopyrano [3,4-b] pyrrol-4-ones

Synthesis of [1]benzopyrano[2,3-b]pyrrol

Synthesis of [1]benzopyrano[2,3-b]pyrrol-4(1H)-ones

✍ Angel Alberola; Rocío Álvaro; Alfonso González Ortega; Carmen Sañudo 📂 Article 📅 1997 🏛 Elsevier Science 🌐 French ⚖ 510 KB

Synthesis of 2-Methyl-9-oxo-9 H -furo[2,

Synthesis of 2-Methyl-9-oxo-9 H -furo[2,3- c ]benzopyrans and 2-Methyl-3 H ,4 H [1]benzopyrano[3,4- b ]pyrrol-4-ones

✍ Ram, Raghu; Krupadanam, S.; Srimannarayana, G. 📂 Article 📅 1998 🏛 Taylor and Francis Group 🌐 English ⚖ 288 KB

ChemInform Abstract: Synthesis of [1]Ben

ChemInform Abstract: Synthesis of [1]Benzopyrano[4,3-b]pyrrol-4(1H)-ones from 4-Chloro-3-formylcoumarin.

✍ Angel Alberola; Luis Calvo; Alfonso Gonzalez-Ortega; Alfonso P. Encabo; M. Carme 📂 Article 📅 2010 🏛 John Wiley and Sons ⚖ 33 KB 👁 1 views

ChemInform Abstract: Synthesis of 2-Meth

ChemInform Abstract: Synthesis of 2-Methyl-9-oxo-9H-furo[2,3-c]benzopyrans and 2-Methyl-3H,4H[1]benzopyrano[3,4-b]pyrrol-4-ones.

✍ R. S. RAM; G. L. D. KRUPADANAM; G. SRIMANNARAYANA 📂 Article 📅 2010 🏛 John Wiley and Sons ⚖ 32 KB 👁 1 views

## Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable v

ChemInform Abstract: Synthesis of [1]Ben

ChemInform Abstract: Synthesis of [1]Benzopyrano[2,3-b]pyrrol-4(1H)-ones.

✍ A. ALBEROLA; R. ALVARO; A. GONZALEZ ORTEGA; C. SANUDO 📂 Article 📅 2010 🏛 John Wiley and Sons ⚖ 33 KB 👁 1 views

## Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable v

Efficient synthesis of trisubstituted [1

Efficient synthesis of trisubstituted [1]benzopyrano[4,3-b]pyrrol-4(1H)-one derivatives from 4-hydroxycoumarin

✍ Yuan-Xiu Liao; Pei-Yu Kuo; Ding-Yah Yang 📂 Article 📅 2003 🏛 Elsevier Science 🌐 French ⚖ 128 KB

Various trisubstituted [1]benzopyrano[4,3-b]pyrrol-4(1H)-one derivatives have been synthesized from 4-hydroxycoumarin with a 30-40% yield over six steps. The key step of the synthesis is a base-promoted intramolecular cyclization of enamines 5, followed by dehydration to generate the fused pyrrole r