Synthesis and Spectroscopic Analysis of a Stereoisomer Library of the Phytophthora Mating Hormone α1 and Derived Bis-Mosher Esters
摘要:
Fluorous mixture synthesis provided all eight diastereomers of the phytophthora hormone alpha 1 with the R configuration at C11 as individual samples after demixing and detagging. The library of all possible bis-Mosher esters (16) was then made by esterification. Complete sets of H-1, C-13, and (for the Mosher esters) F-19 NMR spectra were recorded, assigned, and compared with each other and with published spectra. Not all of the spectra are unique, and the H-1 NMR spectra of the Mosher esters provided the most information. The previous assignment of the natural sample as an "all-R" stereoisomer mixed with its 3S-epimer was confirmed.
A library of resorcylicacidlactones (RAL) containing a cis‐enone moiety targeting kinases bearing a cysteine residue within the ATP‐binding pocket was prepared using a fluorous‐mixture synthesis and evaluated against a panel of 19 kinases thus providing important structure–activity trends. Two new analogues were then profiled for their selectivity against a panel of 402 kinases providing the broadest
Total Synthesis of a 28-Member Stereoisomer Library of Murisolins
作者:Dennis P. Curran、Qisheng Zhang、Cyrille Richard、Hejun Lu、Venugopal Gudipati、Craig S. Wilcox
DOI:10.1021/ja061801q
日期:2006.7.1
library, fluorous PMB (p-methoxybenzyl) groups encode configurations, and fourmixtures of four dihydroxy-tetrahydrofurans are prepared by Shi epoxidation followed (optionally) by Mitsunobu reaction. The mixtures are coupled by Kocienski-Julia reaction with a single hydroxybutenolide followed by hydrogenation. Demixing and detagging provide the 16 pure stereoisomers. In the second synthesis, a single
Synthesis and Spectroscopic Analysis of a Stereoisomer Library of the Phytophthora Mating Hormone α1 and Derived Bis-Mosher Esters
作者:Reena Bajpai、Dennis P. Curran
DOI:10.1021/ja2082679
日期:2011.12.21
Fluorous mixture synthesis provided all eight diastereomers of the phytophthora hormone alpha 1 with the R configuration at C11 as individual samples after demixing and detagging. The library of all possible bis-Mosher esters (16) was then made by esterification. Complete sets of H-1, C-13, and (for the Mosher esters) F-19 NMR spectra were recorded, assigned, and compared with each other and with published spectra. Not all of the spectra are unique, and the H-1 NMR spectra of the Mosher esters provided the most information. The previous assignment of the natural sample as an "all-R" stereoisomer mixed with its 3S-epimer was confirmed.