SCHWEFELVERBINDUNGEN DES ERDÖLS IX.¹ CYCLOPENTATHIOPHENE AUS 3,5-DI(β-NAPHTHYL) −2,4-THIOPHENDI-CARBONSÄURE-DERIVATEN

Friedrich Boberg Institut für Organische Chemie der Technischen Universität Clausthal, Leibnizstraß 6, D-3392 Clausthal-Zellerfeld, Sonderforschungsbereich 134 Erdöltechnik-Erdölchemie

Wolfgang Schmidt Institut für Organische Chemie der Technischen Universität Clausthal, Leibnizstraß 6, D-3392 Clausthal-Zellerfeld, Sonderforschungsbereich 134 Erdöltechnik-Erdölchemie

Alfons Garming Institut für Organische Chemie der Technischen Universität Clausthal, Leibnizstraß 6, D-3392 Clausthal-Zellerfeld, Sonderforschungsbereich 134 Erdöltechnik-Erdölchemie

Abstract

Ring closure reactions at the 3,5-di(β-naphthyl)-2,4-thiophenedicarboxylic acid and its derivates lead to the b- and c-anellated cyclopentathiophene systems 2, 3a and 3c. The angular structure of the ring closure products is proved by ¹H-NMR-studies; UV/Vis-spectroscopic studies discriminate between the sides of anellation on the thiophene.

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SCHWEFELVERBINDUNGEN DES ERDÖLS IX.¹ CYCLOPENTATHIOPHENE AUS 3,5-DI(β-NAPHTHYL) −2,4-THIOPHENDI-CARBONSÄURE-DERIVATEN

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SCHWEFELVERBINDUNGEN DES ERDÖLS IX.1 CYCLOPENTATHIOPHENE AUS 3,5-DI(β-NAPHTHYL) −2,4-THIOPHENDI-CARBONSÄURE-DERIVATEN

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SCHWEFELVERBINDUNGEN DES ERDÖLS IX.¹ CYCLOPENTATHIOPHENE AUS 3,5-DI(β-NAPHTHYL) −2,4-THIOPHENDI-CARBONSÄURE-DERIVATEN