2000 benzofuran derivatives

benzofuran derivativesR 0070

01 - 136Studies on Oxygen Heterocycles. Part 2. Synthesis of 2-Arylcoumaranones and 2-Phenylbenzofuran. — Acid-catalyzedcyclization of readily accessible α-diazocarbonyl compounds is a practicaland efficient method to prepare 2-arylcoumaranones. Treatment of the diazocompound (IIa) with silica gel offers a new route to 2-phenylbenzofuran. —(GHOSH, SOMNATH; BANERJEE, INDIRA; BAUL, SUSMITA; Tetrahedron55 (1999) 38, 11537-11546; Dep. Chem., Jadavpur Univ., Calcutta 700 032,India; EN)

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