A new process to synthesis of compound OBI-3424 R-form and S-form products is provided. The "R-form" compound OBI-3423 was first synthesized with 48% overall yield from compound OBI-3424-5 by installation of the labile phosphate motif at later stage. The stereo chemistry is established by 5 steps chemo-enzyme combination synthesis to afford 99% optical purity, After then, the "S-form" compound OBI-3424 is prepared with improving overall yield of 54% from compound OBI-3424-5. The stereo chemistry is established by 4 steps combination of chemo-enzyme synthesis with excellent optical purity of 99%.
提供了一种合成化合物OBI-3424 R-形式和S-形式产物的新工艺。首先通过在后期安装易降解的
磷酸酯基团,从化合物OBI-3424-5中合成了“R-形式”化合物OBI-3423,总产率为48%。立体
化学是通过5步
化学酶组合合成来建立,获得了99%的光学纯度。然后,通过改善总产率为54%,从化合物OBI-3424-5中制备了“S-形式”化合物OBI-3424。立体
化学是通过4步
化学酶组合合成来建立,具有99%的优良光学纯度。