Preparation of Pyrrole-2-carboxylates with Electron-Withdrawing Groups at the 4-Position
作者:Hidemitsu Uno、Masanori Tanaka、Takashi Inoue、Noboru Ono
DOI:10.1055/s-1999-3406
日期:1999.3
Reaction of α-trifluoromethyl, α-cyano, and α-ethoxycarbonyl alkenyl sulfones with ethyl isocyanoacetate in the presence of a base gave 4-substituted pyrrole-2-carboxylates in moderate to good yields.
The Cathodic Desulfonylation of 1-Ethoxycarbonyl- and 1-Cyano-1-(<i>p</i>-tolylsulfonyl)-2-phenylethenes at the Mercury Electrode in Nonaqueous Solvents
作者:Akira Kunugi、Kyo Abe
DOI:10.1246/bcsj.61.3329
日期:1988.9
reduction of 1-ethoxycarbonyl-1-(p-tolylsulfonyl)-2-phenylethene in MeCN and DMF is characterized by the selective elimination of the p-tolylsulfonyl group, resulting in the formation of ethyl (E)-cinnamate in good yields, in the presence of such efficient proton donors as benzoic acid and acetic acid. On the other hand, the cathodic desulfonylation of 1-cyano-1-(p-tolylsulfonyl)-2-phenylethene proceeds with