Zhabinskii VN, Osiyuk DA, Ermolovich YV, Chaschina NM, Dalidovich TS, Strnad M, Khripach VA. Synthesis of ergostane-type brassinosteroids with modifications in ring A.
Beilstein J Org Chem 2017;
13:2326-2331. [PMID:
29181112 PMCID:
PMC5687004 DOI:
10.3762/bjoc.13.229]
[Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2017] [Accepted: 10/10/2017] [Indexed: 11/23/2022] Open
Abstract
Herein, we present a new strategy for the preparation of a broad range of brassinosteroid biosynthetic precursors/metabolites differing by the ring A fragment. The protocol is based on the use of readily available phytohormones of this class bearing a 2α,3α-diol moiety (epibrassinolide or epicastasterone) as starting materials. The required functionalities (Δ2-, 2α,3α- and 2β,3β-epoxy-, 2α,3β-, 2β,3α-, and 2β,3β-dihydroxy-, 3-keto-, 3α- and 3β-hydroxy-, 2α-hydroxy-3-keto-) were synthesized from 2α,3α-diols in a few simple steps (Corey-Winter reaction, epoxidation, oxidation, hydride reduction, etc.).
Collapse