(±)-4-oxo-2-[2-(4-oxo-1,2,3-benzotriazin-3(4H)-yl)ethyl]-4-[6-(tetrahydro-2H-pyran-4-ylmethoxy)-1,2-benzoxazol-3-yl]butanoic acid 在
column: Daicel Chiralpak IB 作用下,
以
二甲基亚砜 为溶剂,
生成 (2R)-4-oxo-2-[2-(4-oxo-1,2,3-benzotriazin-3(4H)-yl)ethyl]-4-[6-(tetrahydro-2H-pyran-4-ylmethoxy)-1,2-benzoxazol-3-yl]butanoic acid 、 (2S)-4-oxo-2-[2-(4-oxo-1,2,3-benzotriazin-3(4H)-yl)ethyl]-4-[6-(tetrahydro-2H-pyran-4-ylmethoxy)-1,2-benzoxazol-3-yl]butanoic acid