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Aromatase Inhibitors: Synthesis, Biological Activity, and Structure of 1,2-Imidazolylmethylcyclopentanol Derivatives.

1995; Pharmaceutical Society of Japan; Volume: 43; Issue: 12 Linguagem: Inglês

10.1248/cpb.43.2152

1347-5223

Asami Kato, Yasunori Ikeda, Norifumi Sugita, Toshikazu Nitta, Hiroyuki Enari, Akiko Kashima, Masae Konno, Kenji Niimura,

Synthesis and biological activity

Two series of 1,2-disubstituted imidazolylmethylcyclopentanol derivatives (5a-d, 10a-d) were prepared by using easily available methyl 2-oxocyclopentanecarboxylate as the starting material. Evaluation of the aromatase inhibitory activities in vitro was performed. Their activities were compared with those of a steroidal aromatase inhibitor, Formestane, and a non-steroidal inhibitor, Fadrozole. Among these compounds, the aromatase inhibitory activities of 5d, 10a, 10b, 10c, 11a, 15a, and 15b were more potent than Formestane. One compound, 1-(4-chlorobenzyl)-cis-2-(1H-imidazol-1-ylmethyl)cyclopentanol+ ++ (10a) was in particular identified as a potent aromatase inhibitor in vitro, exhibiting an IC50 value of 4 x 10(-8)M. The enantiomers of 10a were separated, and their absolute configuration were determined by X-ray crystallography.