Milić D, Kop T, Juranić Z, Gasić MJ, Tinant B, Pocsfalvi G, Solaja BA. Synthesis and antiproliferative activity of A-ring aromatised and conduritol-like steroidal compounds.
Steroids 2005;
70:922-32. [PMID:
16139855 DOI:
10.1016/j.steroids.2005.07.001]
[Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/18/2005] [Revised: 07/11/2005] [Accepted: 07/13/2005] [Indexed: 11/23/2022]
Abstract
A simple approach to aromatization of steroidal quinols and epoxyquinols using a catalytic amount of TMSOTf is reported. Beside acetylation of the angular OH, the acid-catalyzed (TfOH) dienone-phenol rearrangement occurred affording "para" products, or in the case of blocked position 4, the acetoxy group 1,2-migration leads to the formation of "meta" products. Using epoxyquinol derivative as a substrate, the acetoxy group elimination was observed, followed by acid-catalyzed epoxy-ring opening and subsequent double bond migration, giving as a final product Delta(9,11)A-ring aromatized compounds. Synthesis of conduritol-like compounds and structure confirmation by X-ray crystallography of the precursor of steroidal conduritol is also described. In addition, the results of extensive antiproliferative screening against a panel of 60 cancer cell lines are presented.
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