Proteasome Inhibition by a Totally Synthetic β-Lactam Related to Salinosporamide A and Omuralide
作者:Philip C. Hogan、E. J. Corey
DOI:10.1021/ja056284a
日期:2005.11.1
enantioselectively by multistep synthesis from the readily prepared intermediates 7 and 8 which were joined by a [2 + 2]-cycloaddition reaction to form the spiro beta-lactam 9 stereoselectively. The intermediate 9 was converted to 3 in seven steps and 30% overall yield. The beta-lactam 3 is stable for many days in water at pH 7, in contrast to the natural beta-lactones salinosporamide A (1) and omuralide (2)
一种新的和有效的蛋白酶体抑制剂,β-内酰胺 3,已经通过多步合成从容易制备的中间体 7 和 8 对映选择性地获得,中间体 7 和 8 通过 [2 + 2]-环加成反应连接以立体选择性地形成螺β-内酰胺 9。中间体 9 分七步转化为 3,总产率为 30%。与天然 β-内酯盐孢菌酰胺 A (1) 和 omuralide (2) 相比,β-内酰胺 3 在 pH 值为 7 的水中可稳定多天。与 1 和 2 一样,β-内酰胺 3 能有效抑制哺乳动物蛋白酶体。