methyl (E)-11-(2-ethyl-3-oxocyclopent-1-enyl)-9-hydroxyundec-10-enonate;phytoprostane B1 type II methyl ester;phytoprostane-B1 type II methyl ester;phytoprostane B1 type II methyl ester;9-L1-PhytoP methyl ester;methyl (E,9S)-11-(2-ethyl-3-oxocyclopenten-1-yl)-9-hydroxyundec-10-enoate
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.
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
A concise approach to both enantiomers of phytoprostane B1 type II
作者:Wiesława Perlikowska、Marian Mikołajczyk
DOI:10.1016/j.tetasy.2011.10.005
日期:2011.10
The synthesis of enantiomeric phytoprostane B1 type II methyl esters has been accomplished in approximately 30% overall yield via two basic transformations starting from 3-[(dimethoxyphosphoryl)methyl]cyclopentenone as a key reagent. They include ethylation of the ring C(2) carbon and a Horner olefination reaction using the phosphonate moiety at C(3). The novel components of the Horner reaction, the