Alkylation of brain corticosteroid acetyltransferase by 17-hydroxyprogesterone 17-(9-oxo-10-chlorodecanoate) and related compounds.
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Acetyltransferases↗
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Results for “Spectrophotometry, Infrared”
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Synthesis of 2-hydroxy-ethynylestradiol and 4-hydroxy-ethynylestradiol.
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Chromatography↗
Chemical synthesis and mass spectrometric characterization of some C-27 steroids.
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Aluminum↗
1,4-Androstadiene-3,17-dione found in the urine of a boy.
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17-Ketosteroids↗
Sterol metabolism. XXVI. Pyrolysis of some sterol allylic alcohols and hydroperoxides.
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Chemical Phenomena↗
Steroids and related products. 39. The functionalization of the 17-methyl group of 17 -methyl steroids. II. The synthesis of 12 ,17 1 -epoxy-17 -methylprogesterone and of 20-oxygenated 17 -hydroxymethyl steroids.
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Chromatography↗
Trace analysis of ecdysones by gas-liquid chromatography, radioimmunoassay and bioassay.
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Animals↗
A novel bufadienolide synthesis.
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Aluminum↗
24Epsilon-methylcholestane-3beta,5alpha,6beta,25-tetrol 25-monoacetate. A novel polyhydroxylated steroid from an alcyonarian.
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Acetates↗
Brisbagenin and brisbenone, two new spirostanes from Cordyline species.
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Acetylation↗
Synthesis of compounds of potential value in the radioimmunoassay of 17 alpha-ethynylestradiol and mestranol.
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Animals↗
Cyclization of 13beta-ethyl-3-methoxy-17beta-ol-8,14-seco-1,3,5(10),9-gonatetraen-14-one and its 17 acetate derivative.
13beta-Ethyl-3-methoxy-17beta-ol-8,14-seco-1,3,5(10),8-gonatetraen-14-one (IIIa) was isolated and its participation in the well-known acidic cyclization process was established.
Acetates↗
Chemical synthesis, spectral properties, and chromatography of 4alpha-methyl and 4beta-methyl isomers of (24R)-24-ethyl-5alpha-cholestan-3beta-ol and (24S)-24-ethyl-cholesta-5,22-dien-3beta-ol.
Described herein are chemical syntheses of the following compounds: 4-methyl-(24S)-24-ethyl-cholesta-4,22-dien-3-one, 4,4-dimethyl-(24S)-24-ethyl-cholesta-5,22-dien-3-one, 4beta-methyl-(24R)-24-ethyl-5alpha-cholestan-3beta-ol, 4alpha-methyl-(24R)-24-ethyl-5alpha-cholestan-3beta-ol, 4alpha-methyl-(24S)-24-ethyl-5alpha-cholest-22-en-3beta-ol, 4-methyl-6beta-bromo-(24S)-24-ethyl-cholesta-4,22-dien-3-one, 4alpha-methyl-(24S)-24-ethyl-cholesta-5,22-dien-3beta-ol, 4alpha,5alpha-epoxy-(24S)-24-ethyl-cholesta-4,22-dien-3beta-yl acetate, 4beta-methyl-(24S)-24-ethyl-cholest-22-en-3beta,5alpha-diol, 4beta-methyl-5alpha-hydroxy-(24S)-24-ethyl-cholest-22-en-3beta-yl acetate, 4beta-methyl-(24S)-24-ethyl-cholesta-5,22-dien-3beta-yl acetate and 4beta-methyl-(24S)-24-ethyl-cholesta-5,22-dien-3beta-ol. Chromatographic, nuclear magnetic resonance, and mass spectral data are presented for the compounds under consideration.
Cholestadienols↗
Application of the Wittig-Horner reaction to steroid ketones.
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Chemical Phenomena↗
Heterocyclic steroids. Part-V. Studies on the total synthesis of racemic 3-methoxy-7-oxaestra-1,3,5(10),8-tetraen-17(e)-ol.
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Chromans↗
5alpha-Pregna-1,20-dien-3-one and related compounds from a soft coral.
Four unusual pregnane derivatives, 5alpha-pregna-1,20-dien-3-one (1), 1,4,20-pregnatrien-3-one (3), 5alpha-pregn-20-en-3alpha-o1 o-acetate (4), and 5alpha-pregn-20-en-1alpha,3alpha-diol 3-acetate (6) have been isolated from an unidentified soft coral from Canton Island.
Animals↗
Synthesis of 5alpha-pregna-1,20-dien-3-one.
5ALPHA-Pregna-1,20-dien-3-one has been synthesized from 3beta-hydroxy-5alpha-pregnan-20-one by reaction of the tosylhydrazone with butyllithium to introduce the vinyl moiety. Oxidation of the alcohol and treatment of the anion of the resulting ketone with benzeneselenenyl chloride gave the 2-phenylseleno derivative. This afforded the conjugated enone on oxidative elimination.
Circular Dichroism↗
3alpha-Hydroxy-5beta,14beta-chol-8-en-24-oic acid and its isomer, dehydration products of chenodeoxycholic acid obtained by treatment with concentrated HC1.
3alpha, 7alpha-Dihydroxy-5beta-cholan-24-oic acid in acetic acid was treated with concentrated hydrochloric acid at room temperature. Two of the dehydration products thus obtained proved to correspond to the beta- and gamma-acids reported (5). One (gamma-acid) of these was identified as 3alpha-hydroxy-5beta, 14beta-chol-8-en-24-oic acid (IIa) by means of several spectral measurements of itself and its OsO4 oxidation products. Chemical structure of the other (beta-acid) remains undetermined.
Chemical Phenomena↗