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

被引：9

作者：

FREJD, T

KARLSSON, O

机构：

来源：

TETRAHEDRON | 1979年 / 35卷 / 18期

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.

引用

页码：2155 / 2159

页数：5

共 19 条

[1] AGANAT I, 1977, J AM CHEM SOC, V99, P7068
[2] BLICKE FF, 1942, J AM CHEM SOC, V64, P453
[3] BURCKHALTER JH, 1951, J AM CHEM SOC, V73, P4460
[4] BUUHOI NP, 1949, RECL TRAV CHIM PAY B, V68, P441
[5] DANIELS F, 1970, EXPT PHYSICAL CHEM, P222
[6] FREJD T, UNPUBLISHED
[7] GRONOWITZ S, 1972, ACTA CHEM SCAND, V26, P1851
[8] GRONOWITZ S, 1960, ARK KEMI, V16, P539
[9] HAST RT, 1950, J AM CHEM SOC, V72, P3286
[10] UNSATURATED GAMMA-THIOLACTONES .6. STRUCTURE OF SOME OXIDATIVE COUPLING PRODUCTS OF 5-ALKYLSUBSTITUTED THIOLENE-2-1
HORNFELDT, AB
[J]. ACTA CHEMICA SCANDINAVICA, 1967, 21 (07): : 1952 - +

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