A Short Enantioselective Formal Synthesis of (+)-(S)-4,4-(Ethylenedioxy)-7-hydroxyoct-2-enoic Acid: The Penultimate Precursor to (-)-(R,R)-Pyranophorin
Reductive biotransformation of carbonyl compounds—application of fungus, Geotrichum sp. G38 in organic synthesis
作者:Gu Jian-Xin、Li Zu-Yi、Lin Guo-Qiang
DOI:10.1016/s0040-4020(01)87947-3
日期:1993.6
The microbial transformation of 2- and 3-oxo esters and diketones with Geotrichum sp. G38 and its application to the syntheses of the key intermediates of several bioactive compounds such as (R)-denopamine 8, (R)-fluoxetine 11 and (2S, 3R)-sitophilate 14 were described.
of this paper was the stereoselectivetotalsynthesis of (-)-Pyrenophorin from commercially available starting material (S)-propylene oxide with high yields. Methods: Stereoselectivetotalsynthesis of (-)-Pyrenophorin was done by hydrolytic kinetic resolution, Wittig olefination followed by Mitsunobu reaction. Results: The disconnection approach analysis (retrosynthetic) of (-)-Pyrenophorin envisions
Total Synthesis of (−)-Pyrenophorin<i>via</i>Cobalt(II) Porphyrin-Catalyzed Oxygenation of Ethyl (2<i>E</i>,4<i>E</i>,7<i>R</i>)-7-Acetoxy-2,4-octadienoate
(−)-Pyrenophorin was synthesized by the Mitsunobu reaction of (2E,7S)-4,4-ethylenedioxy-7-hydroxy-2-octenoic acid which has been prepared via cobalt(II) porphyrin-catalyzed oxygenation of ethyl (2E,4E,7S)-7-acetoxy-2,4-octadienoate.
Preparation of macrodiolides via a common chiral building block. Total synthesis of (−)-pyrenophorin and (−)-pyrenophorol
作者:Nobuo Machinaga、Chihiro Kibayashi
DOI:10.1016/0040-4039(93)89027-n
日期:1993.1
Macrodiolides (−)-pyrenophorin and (−)-pyrenophorol have been synthesized utilizing a C2 symmetric (R,R)-diepoxide as a common enantiopure chiralbuildingblock.
A [3+2]nitrile oxide cycloaddition approach to (−)-pyrenophorin, and rosefuran
作者:Achille Barco、Simonetta Benetti、Carmela De Risi、Gian P. Pollini、Vinicio Zanirato
DOI:10.1016/0040-4020(95)00392-l
日期:1995.7
been conveniently applied as carbon-carbon bond forming reaction for the assemblage of the functionalized carbon atom fragments required for the synthesis of two simple but different targets such as the macrolide antibiotic (−)-pyrenophorin 1 and rosefuran 2, a trace component of the high prized oil of rose. In both cases, an intermediate 3,5-disustituted isoxazoline ring system has been used as serviceable