cas 83-47-6, (3beta,24S)-stigmast-5-en-3-ol

Articles about 83-47-6Total 8 be found

Process for recovery of plant sterols from by-product of vegetable oil refining
The process for recovery of plant sterols and tocopherols from deodorization distillates formed during chemical or physical refining of vegetable oils consists of the following steps: free fatty acids are removed from the deodorization distillate by vacuum distillation or by continuation solvent saponification, after the removal of free fatty acids, the received material is reacted with an aromatic carboxylic acid anhydride at a temperature of 50-150° C., under reduced pressure, after the treatment with anhydride, tocopherols are removed from the mixture, and crystalline free sterols are recovered from the distillation residue containing sterol esters, di- and triglycerides by transesterification.
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Page/Page column 5-6

(2008/06/13)

Stereochemistry in the Hydrogenation of Steroidal (22R)- and (22S)-Δ24-26,22-Lactones
Catalytic hydrogenation of the (22R)-unsaturated lactone 8 and its (22S)-epimer 9 afforded stereoselectively the (22R,24R)-saturated lactone 10 and the (22S,24S)-isomer 11, respectively.The C-24 stereochemistry of the hydrogenated products was determined by their conversion into 24-ethylcholesterols.Keywords - stereoselective hydrogenation; stereoidal lactone; sitosterol; clionasterol
Iwadate, Hiroshi,Gamoh, Keiji,Fujimoto, Yoshinori,Ikekawa, Nobuo
p. 2061 - 2065
(2007/10/02)

Side Chain Structural Requirement for Utilization of Sterols by the Silkworm for Growth and Development. Non-stereoselective Utilization of the 24-Stereoisomeric Pairs of 24-Alkylsterols
Four C-24 epimeric pairs of 24-alkylsterols 1-8 were stereoselectively synthesized via orthoester Claisen rearrangement of the (22)R or (22S)-Δ23Z steroid derivatives (11 and 12).These compounds were tested on the silkworm larvae, Bombyx mori, in order to examine the relationship of the C-24 stereochemical arrangement and utilizability as a nutrient sterol.All of the tested sterols effectively supported the growth and development of the insect and were converted into cholesterol regardless of the C-24 configuration.Keywords - 24-alkylcholesterol; 24-alkyl-22-dehydrocholesterol; orthoester Claisen rearrangement; stereoselective synthesis; insect sterol; silkworm
Fujimoto, Yoshinori,Kimura, Miki,Khalifa, Fathy A. M.,Ikekawa, Nobuo
p. 4372 - 4381
(2007/10/02)

New glycosides, terpenoids, colouring matters, sugars and fatty compounds from the flowers of Salmalia malabarica
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Rizvi,Saxena
p. 285 - 287
(2007/10/05)

Triterpene constituents of Tabernaemontana laurifolia and Haplophyton cimicidum
The triterpene bauerenyl acetate was isolated directly by crystallization from the non-polar neutral extract of the bark of Tabernaemontana laurifolia D.C. A similar extract of Haplophyton cimicidum (whole plant) yielded, after chromatography, the triterpenes erythrodiol monostearate, bauerenol and betulin, as well as the steroid β-sitosterol.
Cava,Shubber,Rao, Kota V.
p. 1301 - 1303
(2007/10/12)