Preparation of arylpropiolate esters from trichlorocyclopropenium cation and elaboration of the esters to unsymmetrical 1,4-pentadiyn-3-ones and unsymmetrical tellurapyranones
Catalyst- and solvent-free approach to 2-arylated quinolines <i>via</i> [5 + 1] annulation of 2-methylquinolines with diynones
作者:Hai-Yuan Zhao、Fu-Song Wu、Li Yang、Ying Liang、Xiao-Lin Cao、Heng-Shan Wang、Ying-Ming Pan
DOI:10.1039/c7ra12716b
日期:——
A novel route for the synthesis of 2-arylated quinolines through a [5 + 1] annulation directly from 2-methylquinolines and diynones under catalyst-free and solvent-free conditions was disclosed. This synthetic process was atom-economic, with good tolerance of a broad range of functional groups, and with great practical worth.
Preparation of arylpropiolate esters from trichlorocyclopropenium cation and elaboration of the esters to unsymmetrical 1,4-pentadiyn-3-ones and unsymmetrical tellurapyranones
作者:Donald H. Wadsworth、Susan M. Geer、Michael R. Detty
DOI:10.1021/jo00392a031
日期:1987.8
Brønsted Acid Catalyzed and NIS-Promoted Cyclization of Diynones: Selective Synthesis of 4-Pyrone, 4-Pyridone, and 3-Pyrrolone Derivatives
Brønsted acid catalyzed tandem cyclization was found to be highly effective for the preparation of a series of polysubstituted 4-pyrones from diynones (yield up to 99%). 4-Pyridone and 3-pyrrolone derivatives were also selectively synthesized by employing NIS and/or Brønsted acid. NIS as an electrophilic reagent could promote these reactions efficiently and rapidly under very mild reaction conditions