title: Cyclohex-1-ene carboxylic acids: synthesis and biological evaluation of novel inhibitors of human 5 alpha reductase.
abstract: In search of novel nonsteroidal mimics of steroidal inhibitors of 5 alpha reductase, 4-(2-phenylethyl)cyclohex-1-ene carboxylic acids 1-5 were synthesized with different substituents in para position of the phenyl ring (1: N, N-diisopropylcarbamoyl, 2: phenyl, 3: phenoxy, 4: benzoyl, and 5: benzyl). The principal synthetic approach for the desired compounds consisted of a Wittig olefination between 1, 4-dioxaspiro [4.5]-decane-8-carbaldehyde (4g and the appropriate phosphonium salts. The compounds were tested for inhibition of human 5 alpha reductase isozymes 1 and 2 using DU 145 cells and preparations from prostatic tissue, respectively. They turned out to be good inhibitors of the prostatic isozyme 2 with compound 1 being the most potent one (IC(50) = 760 nM). Isozyme 1 was only slightly inhibited. It is concluded that the novel structures are appropriate for being further optimized, aiming at the development of a novel drug for the treatment of benign prostatic hyperplasia.
authors.affiliation: Pharmaceutical and Medicinal Chemistry, Saarland University, Saarbrücken, Germany.
authors.forename: Eckhard
authors.initials: E
authors.lastname: Baston
authors.forename: Ola I A
authors.initials: OI
authors.lastname: Salem
authors.forename: Rolf W
authors.initials: RW
authors.lastname: Hartmann
mesh_terms: D058891:5-alpha Reductase Inhibitors; D002264:Carboxylic Acids / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D002851:Chromatography, High Pressure Liquid; D004791:Enzyme Inhibitors / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D006801:Humans; D007527:Isoenzymes / Q000187:drug effects; D008297:Male; D013329:Structure-Activity Relationship
chemical_list: D058891:5-alpha Reductase Inhibitors; D002264:Carboxylic Acids; D004791:Enzyme Inhibitors; D007527:Isoenzymes