Savchenko RG, Kostyleva SA, Kachala VV, Khalilov LM, Odinokov VN. Hydroxylation and epimerization of ecdysteroids in alkaline media: stereoselective synthesis of 9α-hydroxy-5α-ecdysteroids.
Steroids 2014;
88:101-5. [PMID:
24998869 DOI:
10.1016/j.steroids.2014.06.019]
[Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/18/2014] [Revised: 05/23/2014] [Accepted: 06/22/2014] [Indexed: 11/29/2022]
Abstract
Autoxidation of diacetonides of 20-hydroxyecdysone and ponasterone A under treatment with excess of NaOH in methanol leads to the formation of 9α-hydroxy-5α-ecdysteroids previously not described. Their structures have been determined by detailed NMR analysis. Catalytic hydrogenation (Pd-C, MeOH-MeONa) of hydroxylated ecdysteroids affords the 7,8α-dihydro-9α-hydroxy-5α-ecdysteroids.
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