Results 81 to 90 of about 282 (137)
Vitamin D and Cardiovascular Complications of CKD: What's Next? [PDF]
Clin J Am Soc Nephrol, 2019 Banerjee D, Jha V.
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Mesogenisity of 3b-alkoxy-5a-cholestan
Proceedings of Japanese Liquid Crystal Society Annual meeting, 2004 Kato, Tatsuya +5 more
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Naturally Occurring Norsteroids and Their Design and Pharmaceutical Application. [PDF]
BiomedicinesDembitsky VM.
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Some of the next articles are maybe not open access.
Tetrahedron, 1971
Abstract 2-oxa ( 11 ), 2-thia ( 12 ) and 2-aza ( 19 ), 5α-cholestanes were prepared from the sulfonic esters of A-seco-2-nor-5α-cholestan-1,3-diol ( 9 and 10 ). Although cyclopentamethylenediphenylphosphonium tosylate ( 4 ) could be obtained from pentan-α,ω-ditosyloxy ( 6 ) and Ph 2 PK, attempts to prepare 3-phosphacholestane ( 16 ) in a similar ...
Y Kashman
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Abstract 2-oxa ( 11 ), 2-thia ( 12 ) and 2-aza ( 19 ), 5α-cholestanes were prepared from the sulfonic esters of A-seco-2-nor-5α-cholestan-1,3-diol ( 9 and 10 ). Although cyclopentamethylenediphenylphosphonium tosylate ( 4 ) could be obtained from pentan-α,ω-ditosyloxy ( 6 ) and Ph 2 PK, attempts to prepare 3-phosphacholestane ( 16 ) in a similar ...
Y Kashman
exaly +2 more sources
The structure of ‘cholestane-3,4,6-trione’
J. Chem. Soc., Perkin Trans. 1, 1972The compound described as ‘cholestane-3,4,6-trione’ by Windaus and Kuhr has been shown to be the 3-ethyl ether of the corresponding dienol. Although relatively stable to acid, the enol ether may be hydrolysed to yield the triketone, a mixture of two stable tautomers, which may be separated readily by fractional crystallisation.
J T, Pinhey, E, Rizzardo
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A convenient synthesis of 5β-cholestan-26-oic and 5β-cholestan-26,27-dioic acids
Steroids, 2000A new method for the preparation of 5beta-cholestan-26-oic acids 7 and their analogs is described. The key steps in the synthesis are: iodination of bis- and tris-formyloxy-5beta-cholan-24-ols 3; nucleophilic substitution of iodides 4 with diethyl sodiomalonate; complete alkaline hydrolysis of esters 5; and subsequent decarboxylation of geminal diacids
I, Starchenkov +4 more
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Hofmann degradation of 5α-cholestan-4α- and 5α-cholestan-4β-yltrimethylammonium salts
J. Chem. Soc. B, 1970Alkaline degradation of 5α-cholestan-4α-yltrimethylammonium iodide gives mainly 5α-cholestan-4α-yldimethyl-amine with a little cholest-3-ene, while the 4β-isomer gives cholest-4-ene. The unstable 4β-iodide also readily yields cholest-4-ene in boiling neutral alcohol.
E. N. Wall, J. McKenna
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Brassinosteroids with a cholestane side chain
Collection of Czechoslovak Chemical Communications, 1986The synthesis of 2α,3α-dihydroxy-B-homo-7-oxa-cholestan-6-one (VI), 2β,3β-dihydroxy-B-homo-7-oxa-5α-cholestan-6-one (VIII) and 2α,3α-dihydroxy-B-homo-6-oxa-5α-cholestan-7-one (XI) is described. The activity of these brassinosteroids in the bean second internode bioassay is lower than the activity of 24-epibrassinolide (XXI).
Ladislav Kohout, Miroslav Strnad
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The reduction of 5α-cholestan-3-one and 5β-cholestan-3-one by some boranes and hydroborates
Steroids, 1979This paper describes the high yield synthesis of 5 alpha-cholestan-3 alpha-ol and 5 beta-cholestan-3 beta-ol by the reduction of 5 alpha- and 5 beta-cholestan-3-one using using potassium and lithium-tri-sec-butyl-hydroborates as reducing reagents. Attempts to obtain the same alcohols using other bulky boranes resulted in the equatorial products.
R, Contreras, L, Mendoza
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Identification of isomers of cholestane, C27H48
Journal of the Chemical Society, Chemical Communications, 1974The properties of 5α-cholestane and six stereoisomers have been studied to evaluate methods of identification of steranes from gelogical sources.
Lawrence J. Mulheirn, George Ryback
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