Asymmetric syntheses of two of GlaxoSmithKline's highly potent phosphodiesterase IV inhibitors CMPI 1 and CMPO 2 have been accomplished from nitroethane and simple precursors in 8 and 7 steps, respectively. The suggested synthetic strategy involves as a key stage the silylation of enantiopure six-membered cyclic nitronates. In vitro studies of PDE IVB1 inhibition revealed a significant difference in the activity of CMPI 1 and CMPO 2 enantiomers.
葛兰素史克的两种高效
磷酸二酯酶 IV
抑制剂 CMPI 1 和
CMPO 2 已分别通过 8 步和 7 步从
硝基乙烷和简单前体完成不对称合成。建议的合成策略包括对映体纯六元环
硝基化合物的
硅烷化作为关键阶段。 PDE IVB1 抑制的体外研究表明
CMPI 1 和
CMPO 2 对映体的活性存在显着差异。