Novel prostaglandin analogues and process for making same
申请人:THE PROCTER & GAMBLE COMPANY
公开号:EP0061209A1
公开(公告)日:1982-09-29
A novel process for the oxidation of olefins to the corresponding alpha-epoxy alcohols which can be incorporated in the total synthesis of members of a novel class of prostaglandin analogues.
Olefins are reacted with singlet oxygen in the presence of a group IVB, VB or VIB transition metal catalyst, excluding chromium. The reaction is fast and highly selective to the alpha-epoxy alcohol. When cyclopentene is oxidized in the process of the invention, high yields of cis 2,3-epoxy cyclopentan-1-ol ar obtained. The latter compound is used as a starting material in the synthesis of prostaglandin analogues. The prostanoids of the invention are characterized by an oxa group replacing the methylene group at the 7- position, and the absence of a hydroxyl or other substituent at the 11-position.
Members of this class of prostanoids show important cytoprotective properties in animal tests.
Prostaglandins and congeners. 20. Synthesis of prostaglandins via conjugate addition of lithium trans-1-alkenyltrialkylalanate reagents. A novel reagent for conjugate 1,4-additions
作者:Karel F. Bernady、M. Brawner Floyd、John F. Poletto、Martin J. Weiss
DOI:10.1021/jo01323a017
日期:1979.4
Kumar,S. et al., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1976, vol. 14, p. 303 - 305
作者:Kumar,S. et al.
DOI:——
日期:——
The regioselectivity of epoxide-opening reactions using alkynylaluminum reagents