The catalytic asymmetric synthesis of mono-fluoro-, -chloro- and -bromomethyl-1,2-diaryl cyclopropane ester is described. The reaction, using Rh2((S)-BTPCP)4 as a catalyst, allowed the formation of the desired cyclopropanes in good to excellent yields (up to 99%) and excellent diastereoselectivities (up to >20 : 1) and with a high level of enantioselectivities (up to 98% ee). Finally, the synthetic
描述了单
氟-,-
氯-和-
溴甲基-1,2-二芳基
环丙烷酯的催化不对称合成。使用Rh 2((S)-BTPCP)4作为催化剂的反应,可以形成所需的
环丙烷,产率高至优异(高达99%)和非对映选择性(高达> 20:1),且具有良好的非对映选择性。高对映选择性(高达98%ee)。最后,还证明了手性
环丙烷的合成效用。