Polymorphism vs. desmotropy: the cases of 3-phenyl-and 5-phenyl-1H-pyrazoles and 3-phenyl-1H-indazole

…, RM Claramunt, A Kenz, M Pierrot, J Elguero

文献索引：Garcia, Maria Angeles; Lopez, Concepcion; Claramunt, Rosa M.; Kenz, Ahmed; Pierrot, Marcel; Elguero, Jose Helvetica Chimica Acta, 2002 , vol. 85, # 9 p. 2763 - 2776

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被引用次数: 59

摘要

Two desmotropes, 3-phenyl-1H-pyrazole (1a) and 5-phenyl-1H-pyrazole (1b) have been isolated and the conditions for their interconversion established. The X-ray structure of 1b has been determined (a 10.862 (1), b 5.7620 (5), c 12.927 (2) ä, β 111.435 (2) 8, space group P21/c), and both tautomers 1a and 1b were characterized by NMR in the solid state (13C-and 15N-CPMAS). In the case of 3-phenyl-1H-indazole (2a), two concomitant ...