作者:Taotao Ling、Venkat R. Macherla、Rama Rao Manam、Katherine A. McArthur、Barbara C. M. Potts
DOI:10.1021/ol0706051
日期:2007.6.1
A novel enantioselective total synthesis of 20S proteasome inhibitor Salinosporamide A (NPI-0052; 1) is presented. Key features include intramolecular aldol cyclization of 6 to simultaneously generate the three chiral centers of advanced intermediate 5, cyclohexene ring addition using B-2-cyclohexen-1-yl-9-BBN, and inversion of the C-5 stereocenter by oxidation followed by enantioselective enzymatic
提出了一种新的对映体选择性合成的20S蛋白酶体抑制剂Salinosporamide A(NPI-0052; 1)。关键特征包括分子内羟醛6的环化反应,以同时生成高级中间体5的三个手性中心,使用B-2-cyclohexen-1-yl-9-BBN加成环己烯环,并通过氧化反应使C-5立体中心反转,然后再进行氧化对映选择性酶促还原。