The present disclosure provides methods of preparing a compound of Formula (1): wherein R1, R2, and R3 are as defined as set forth in the application. In one embodiment, a compound of Formula (1) is prepared in >95% chemical purity and >95% enantiomeric excess.
本公开提供了制备化合物式(1)的方法:其中R1、R2和R3如申请中所定义。在一种实施例中,化合物式(1)以>95%的
化学纯度和>95%的对映体过量制备。