- Spectroscopic evaluation of synthesized 5β-dihydrocortisol and 5β-dihydrocortisol acetate binding mechanism with human serum albumin and their role in anticancer activity
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Our study focus on the biological importance of synthesized 5β-dihydrocortisol (Dhc) and 5β-dihydrocortisol acetate (DhcA) molecules, the cytotoxic study was performed on breast cancer cell line (MCF-7) normal human embryonic kidney cell line (HEK293), th
- Kallubai, Monika,Reddy, Srinivasa P.,Dubey, Shreya,Ramachary, Dhevalapally B.,Subramanyam, Rajagopal
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- COMPOSITIONS AND METHODS FOR TREATING CNS DISORDERS
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Described herein are neuroactive steroids of the Formula (I): or a pharmaceutically acceptable salt thereof; wherein (II), A, R1, R2, R3a, R4a, R4b, R5, R7a, and R7b are as defined herein. Such compounds are envisioned, in certain embodiments, to behave as GABA modulators. The present invention also provides pharmaceutical compositions comprising a compound of the present invention and methods of use and treatment, e.g., such for inducing sedation and/or anesthesia.
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Page/Page column 103-104
(2016/05/24)
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- Direct organocatalytic stereoselective transfer hydrogenation of conjugated olefins of steroids
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Kinetically controlled and organocatalytic syn-selective transfer hydrogenation has been successfully demonstrated for the reduction of the enone functional group of various steroids. Herein, diastereoselective synthesis of many 5β-steroids have been reported through organocatalysis, which have broad medicinal and pharmaceutical applications. The mechanistic studies and the selectivity of the products clearly indicated that the catalyst 1b·d-CSA is mild enough to activate the various chiral cyclic enones through iminium ion formation during the organocatalytic transfer hydrogenations with Hantzsch ester 2a as a hydrogen source. Further, clear evidence for the selective formation of intermediate iminium species [I]+ have been characterized through on-line monitoring of controlled experiments by NMR and ESI-HRMS analyses.
- Ramachary, Dhevalapally B.,Sakthidevi, Rajasekar,Reddy, P. Srinivasa
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p. 13497 - 13506
(2013/09/02)
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- Potential corticoid metabolites: Chemical synthesis of 3- and 21-monosulfates and their double-conjugates of tetrahydrocorticosteroids in the 5 α- and 5 β-series
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Here, we describe the chemical synthesis of the complete sets of 18 novel 3- and 21-monosulfates and their double-conjugated form of tetrahydrocortisol (THF), tetrahydro-11-deoxycortisol (THS), and tetrahydrocortisone (THE) in the 5 α- and 5 β-series. The principal reactions involved are: (1) selective protection of a specific hydroxy group in substrates; (2) catalytic hydrogenation at C-5 of Δ4-3-ketosteroids with 10% Pd(OH) 2/C to yield 3-oxo-5 β-steroids and reductive allomerization with 10% Pd/C to yield 3-oxo-5 α-isomers; (3) reduction of the resulting 3-oxo-5 β- and 3-oxo-5 α-steroids to the corresponding 3 α-hydroxy-compounds with Zn(BH4)2 and K-Selectride, respectively; and (4) sulfation of hydroxy groups at C-3 and/or C-21 in the tetrahydrocorticosteroid derivatives with sulfur trioxide-triethylamine complex.
- Okihara, Rika,Mitamura, Kuniko,Hasegawa, Maki,Mori, Megumi,Muto, Akina,Kakiyama, Genta,Ogawa, Shoujiro,Iida, Takashi,Shimada, Miki,Mano, Nariyasu,Ikegawa, Shigeo
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experimental part
p. 344 - 353
(2011/02/22)
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- Biotransformation of corticosteroids by Penicillium decumbens ATCC 10436
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The biotransformation of a series of corticosteroids by the fungus Penicillium decumbens ATCC 10436 has been investigated. Conversion to the corresponding 5α-dihydroxteroid was observed for all the Δ4-3-ketosteroids studied with the exception of deoxycorticosterone, which was converted to a Δ14-diene. Deoxycorticosterone acetate was, however, converted to a 5α- dihydro product concomitant with ester hydrolysis. Other substrates carrying a C-21 acetoxy group were also hydrolyzed to the alcohol. In two cases (resulting from deoxycorticosterone acetate and 11-deoxycortisone) the 5α- 3-keto-product was further reduced to the 3β-alcohol. No reduction of δ14-dienes was observed.
- Holland, Herbert L.
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p. 646 - 649
(2007/10/02)
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