Bulletin of the Chemical Society of Japan

The substituent effects in thiophene compounds. I. 1H NMR and IR studies in methyl (substituted 2-thiophenecarboxylate) s.

H Satonaka

Index: Satonaka Bulletin of the Chemical Society of Japan, 1983 , vol. 56, # 8 p. 2463 - 2468

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Citation Number: 16

Abstract

The 1 H NMR spectra and the IR carbonyl stretching frequencies of methyl (3-, 4-, and 5- substituted 2-thiophenecarboxylate) s have been reported. Good linear correlations between the chemical shifts of the ring protons in methyl (4-and 5-substituted 2- thiophenecarboxylate) s and those of the corresponding protons in substituted thiophenes were observed. The coupling constants in methyl (substituted 2-thiophenecarboxylate) s ...