Reactions of Active Methylene Compounds. V. New Synthesis of Hydroxy Substituted 2-Hydroxyphenyl Benzyl Ketones and 4 Hydroxy-3-phenylcoumarins, and Structures of the Latter and Related 2-Imides
A new anionic cyclization reaction: Condensation of benzoate esters with nitriles to give 3-amino-2-inden-1-ones
作者:Nadim E. Kayaleh、Ramesh C. Gupta、John F. Morrissey、Francis Johnson
DOI:10.1016/s0040-4039(97)10181-2
日期:1997.11
β-oxonitriles undergo cyclization to give, in most instances, superior yields of the same compounds. Acid hydrolysis of these indenones leads in high yield to the corresponding biologically active (anticoagulant) indandiones.
Enolate Ions as β-Activators of Ortho-Metalation: Direct Synthesis of 3-Aminoindenones
作者:Nadim E. Kayaleh、Ramesh C. Gupta、Francis Johnson
DOI:10.1021/jo991968k
日期:2000.7.1
condensation of benzoate esters with alkyl- or phenylacetonitriles lead to 3-aminoindenones in the presence of excess LDA. This new reaction is also applicable to pyridine carboxylic esters. All of the 3-aminoindenones and their aza analogues can be hydrolyzed by acid to give the corresponding 1,3-indandiones. The mechanism of the reaction falls into the directed-ortho-metalation class in which the initial
Reactions of Active Methylene Compounds. V. New Synthesis of Hydroxy Substituted 2-Hydroxyphenyl Benzyl Ketones and 4 Hydroxy-3-phenylcoumarins, and Structures of the Latter and Related 2-Imides