Concave Reagents, 71) Concave Benzoic Acids
…, C Wangnick, K Peters, HGV Schnering
Index: Luening, Ulrich; Wangnick, Carsten; Peters, Karl; Schnering, Hans Georg von Chemische Berichte, 1991 , vol. 124, # 2 p. 397 - 402
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Citation Number: 30
Abstract
Abstract Based on m-terphenyl units, concave benzoic acids 11a and 12a were prepared via the 2, 6-diarylbenzoic acid 7a. Bromination of 7a with NBS gave 9, and cyclization of 9 with dithiols 10 led to the bimacrocyclic concave acids 11a and 12a. Their relative acidities were determined by photometric titrations in ethanol, and the three-dimensional structure of 11a was determined by X-ray analysis.
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