Synthese von Benzofuranen durch Cyclodehydrierung von Phenylmalonylheterocyclen
作者： Wolfgang Stadlbauer , Otto Schmut , Thomas Kappe
DOI: 10.1007/BF00909657
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摘要: Phenylmalonyl heterocyclic compounds such as the quinolones1a–c or3, benzoquinolizinones6a, b and phenalenones8a, can be converted to benzofuranes (2a–c, 7a, and9a, b) by cyclodehydrogenation with Pd/C in boiling diphenyl ether. 2-Phenylchinchonic acid (10) reacts under same conditions dimeric benzofuroquinoline12: decarboxylated quinoline11 however gives monomer13.
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