Rediscovering Bacon's hydrazine/phenylhydrazine mediated cyclization of 2,2′-dicarbonylbi(hetero)aryls: construction of (5-azo)-/indazolo[2,3-<i>a</i>]quinolines
作者:Pawan S. Dhote、Chepuri V. Ramana
DOI:10.1039/d1ob02207e
日期:——
Hydrazine/phenylhydrazine-mediated reductive dicarbonyl coupling reactions have been carried out under mild conditions to provide polycyclic aromatic compounds and azo-substituted polyaromatic compounds. This method has a broad substrate scope with good functional group compatibility.
Efficient Synthesis of Dibenzo[<i>a</i>,<i>c</i>]cyclohepten-5-ones via a Sequential Suzuki−Miyaura Coupling and Aldol Condensation Reaction
作者:Young Lok Choi、Chan-Mo Yu、Bum Tae Kim、Jung-Nyoung Heo
DOI:10.1021/jo900508z
日期:2009.5.15
strategy for the synthesis of a 7-membered-ring system with a Suzuki−Miyaura coupling followed by an acid/base-promoted intramolecular aldol condensation reaction has been developed. The reaction of 2′-bromoacetophenones with 2-formylphenylboronic acids in the presence of Pd(OAc)2 and CataCXium PIntB L8 efficiently provided biaryl compounds, which were transformed to a wide array of dibenzo[a,c]cyclohepten-5-ones