B/N Lewis pairs have been discovered to catalyze rapid epimerization of meso-lactide (LA) or LA diastereomers quantitatively into rac-LA. The obtained rac-LA can be kinetically polymerized into poly(
L
-lactide) and optically resolved
D
-LA, with a high stereoselectivity factor k
L
/k
D
of 53 and an ee value of 91% at 50.6% monomer conversion, by a bifunctional chiral catalyst. The epimerization and enantioselective polymerization can be coupled into a one-pot process for transforming meso-LA directly into poly(
L
-lactide) and
D
-LA.
B/N路易斯对被发现可以催化快速地将meso-
丙交酯(
LA)或
LA对映异构体定量地转化为rac-
LA。获得的rac-
LA可以通过双功能手性催化剂进行动力学聚合,形成聚(
L-丙交酯)和光学纯的D-
LA,具有高对映选择性因子kL/kD为53,ee值为91%,在50.6%单体转化率下。通过将外消旋化和对映选择性聚合耦合到一个一锅过程中,可以直接将meso-
LA转化为聚(
L-丙交酯)和D-
LA。