A Flexible Synthesis of the Phytoprostanes B1 Type I and II
摘要:
Syntheses of the enantiomerically pure phytoprostanes B-1 type I and II are described starting from furfural and n-propylfuran. Key steps include the preparation of the Freimanis (+/-)-hydroxycyclopentenone and Wittig coupling using chiral phosphonium salts.
[EN] SUBSTITUTED PYRIDONES AS INHIBITORS OF POLY(ADP-RIBOSE) POLYMERASE (PARP)<br/>[FR] PYRIDONES SUBSTITUES INHIBITEURS DE LA POLY(ADP-RIBOSE) POLYMERASE (PARP)
申请人:AVENTIS PHARMA INC
公开号:WO2005097750A1
公开(公告)日:2005-10-20
The present invention discloses and claims a series of 2,3,5-substituted pyridone derivatives as defined herein. This invention also relates to methods of making these compounds. The compounds of this invention are inhibitors of poly(adenosine 5'-diphosphate ribose) polymerase (PARP) and are therefore useful as pharmaceutical agents, especially in the treatment and/or prevention of a variety of diseases, including diseases associated with the central nervous system and cardiovascular disorders.
Prostaglandin analogs and process of preparation thereof
申请人:The United States of America as represented by the Secretary of the Navy
公开号:US04338466A1
公开(公告)日:1982-07-06
Prostaglandin analogs and process for the preparation thereof as precursors or the synthesis of oligomeric mixtures exhibiting biological activity for protection of oxidative phosphorylation of degraded mitochondria. The analogs have the general formula: ##STR1## synthesized by O-alkylating a 2-alkylcyclopentane-1,3-dione to form an enol ether, reacting the ether with CH.sub.2 .dbd.CHMgBr to form a vinyl, oxidizing the vinyl with OsO.sub.4 and NaIO.sub.4 to form an aldehyde, and reacting the aldehyde with a sodium salt of dimethyl (2-oxoalkyl)phosphonate.
synthesis of prostaglandin and phytoprostanes B1 is described. The key step is an intermolecular Pauson−Khand reaction between a silyl-protected propargyl acetylene and ethylene. This reaction, promoted by NMO in the presence of 4 Å molecular sieves, afforded the 3-tert-butyldimethylsilyloxymethyl-2-substituted-cyclopent-2-en-1-ones (III) in good yield and with complete regioselectivity. Deprotection
General Approach to Prostanes B<sub>1</sub>by Intermolecular Pauson-Khand Reaction: Syntheses of Methyl Esters of Prostaglandin B<sub>1</sub>and Phytoprostanes 16-B<sub>1</sub>-PhytoP and 9-L<sub>1</sub>-PhytoP
esters of Prostaglandin B1 and Phytoprostanes 16-B1-PhytoP (PPB1-I) and 9-L1-PhytoP (PPB1-II) based on the modified Julia olefination of a formylcyclopentenone and an appropriately protected hydroxy sulfone has been developed. The cyclopentenones were efficiently prepared by intermolecular Pauson–Khand reaction of a (silyloxymethyl)alkyne. The sulfone counterpart was prepared by regioselective ring-opening