Enantio- and stereoselective route to the phoslactomycin family of antibiotics: formal synthesis of (+)-fostriecin and (+)-phoslactomycin B
作者:Shaheen M. Sarkar、Everlyne N. Wanzala、Setsuya Shibahara、Keisuke Takahashi、Jun Ishihara、Susumi Hatakeyama
DOI:10.1039/b912267b
日期:——
A general methodology applicable for the synthesis of the phoslactomycin family of antibiotics, potent and selective protein phosphatase inhibitors, has been developed starting from a β-isocupreidine-catalyzed asymmetric Baylis–Hillman reaction of 3-(4-methoxybenzyloxy)propanal with hexafluoroisopropyl acrylate, and thereby formal syntheses of (+)-fostriecin and (+)-phoslactomycin B have been accomplished.
(+)-Phoslactomycin B was synthesized by a highly enantio- and stereoselective approach involving asymmetric pentenylation, Suzuki-Miyaura coupling, ring-closing metathesis, asymmetric dihydroxylation, and Stille coupling. The synthetic method developed enables us to synthesize three other isomers concerning the C11-OH and Delta(12)-double bond.
(+)-Phoslactomycin B 是通过一种高度对映面和立体选择性方法合成的,该方法包括不对称戊烯化反应、铃木-宫aura偶联反应、环闭合甲基化反应、不对称双羟基化反应和Stille 偶联反应。所开发的合成方法使我们能够合成另外三种与C11-OH 和Δ(12)-双键相关的异构体。
Total Synthesis of (+)-Fostriecin and (+)-Phoslactomycin B
(+)-Fostriecin and (+)-phoslactomycin B, which are potent and selective inhibitors of protein phosphatase, were synthesized by a highly enantio- and stereoselective approach that enabled us to prepare all possible isomers at both the C11 secondary alcohol position and the ι²-double bond.