title: Synthesis of deuterium-labeled 17-hydroxyprogesterone suitable as an internal standard for isotope dilution mass spectrometry.
abstract: A synthesis is reported of 17-hydroxyprogesterone, labeled with four atoms of deuterium at ring C and suitable for use as an internal standard for isotope dilution mass spectrometry. Base-catalyzed equilibration of methyl 3 alpha-acetoxy-12-oxo-cholanate (III) with 2H2O, followed by reduction of the 12-oxo group by the modified Wolff-Kisher method using [2H]diethylene glycol and [2H]hydrazine hydrate afforded [11,11,12,12,23,23(-2)H]lithocholic acid (V). The Meystre-Miescher degradation of the side chain of V yielded 3 alpha-hydroxy-5 beta-[11,11,12,12(-2)H]pregnan-20-one (X). Oxidation of the 3,20-enol-diacetate of X with perbenzoic acid followed by saponification afforded 3 alpha,17-dihydroxy-5 beta-[11,11,12,12(-2)H]pregnan-20-one (XI). Oxidation of XI with N-bromoacetamide yielded 17-hydroxy-5 beta-[11,11,12,12(-2)H]pregnane-3,20-dione (XII). Bromination of XII followed by dehydrobromination yielded 17-hydroxy-[11,11,12,12(-2)H] progesterone (XIV), consisting of 0.3% 2H0-, 1.1% 2H1-, 8.6% 2H2-, 37.1% 2H3-, 52.1% 2H4-, and 0.8% 2H5-species.
authors.affiliation: Division of Biochemistry, Tottori University, School of Medicine, Yonago, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Shimizu
authors.forename: N
authors.initials: N
authors.lastname: Yamaga
authors.forename: H
authors.initials: H
authors.lastname: Kohara
mesh_terms: D019326:17-alpha-Hydroxyprogesterone; D003903:Deuterium; D006908:Hydroxyprogesterones / Q000138:chemical synthesis*; D013058:Mass Spectrometry; D012015:Reference Standards; D013256:Steroids / Q000138:chemical synthesis
chemical_list: D006908:Hydroxyprogesterones; D013256:Steroids; D019326:17-alpha-Hydroxyprogesterone; D003903:Deuterium