CYCLIZATIONS WITH METHACRYLIC-ACID IN PPA ON THE SYNTHESIS OF CYCLOPENTA[B]THIOPHENONES

被引:9
作者
FREJD, T
KARLSSON, O
机构
关键词
D O I
10.1016/0040-4020(79)87033-7
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
The reaction between some 2-substituted thiophen derivatives and methacrylic acid in PPA has been studied. Isomeric cyclopenta[b]thiophen ketones were formed in several cases, depending on the substituents. Features of their 13C and 1H NMR spectra are discussed and evidence is presented for ringclosure of 3(2-thienyl) propionic acids without rearrangement, in contrast to statements in the literature. © 1979.
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页码:2155 / 2159
页数:5
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