Chen Jian, Liu Qiang, Zhang Weicheng, Spinella Stephen, Lei Aiwen, Zhang Xumu
College of Chemistry and Molecular Sciences, Wuhan University, P.R. China.
Org Lett. 2008 Jul 17;10(14):3033-6. doi: 10.1021/ol800996j. Epub 2008 Jun 13.
A convenient synthetic method was reported for the preparation of N-phthaloyl dehydroamino acid esters from easily accessible vinyl bromides (or vinyl tosylate) and potassium phthalimide. Rh-catalyzed asymmetric hydrogenation of these substrates with TangPhos gave the products with good to excellent enantioselectivities (up to 99% ee).
报道了一种从易于获得的溴乙烯(或对甲苯磺酸乙烯酯)和邻苯二甲酰亚钾制备N-邻苯二甲酰脱氢氨基酸酯的简便合成方法。用TangPhos对这些底物进行铑催化的不对称氢化反应,得到对映选择性良好至优异的产物(对映体过量高达99%)。