To provide a chiral reagent or a salt thereof. The chiral reagent has following chemical formula (I). In the formula (I), G1 and G2 are independently a hydrogen atom, a nitro group (-NO2), a halogen atom, a cyano group (-CN), a group of formula (II) or (III), or both G1 and G2 taken together to form a group of formula (IV).
提供一个手性试剂或其盐。该手性试剂具有以下
化学式(I)。在式(I)中,G1和G2独立地是氢原子,硝基(-
NO2),卤素原子,
氰基(-CN),式(II)或(III)的基团,或者G1和G2共同形成式(IV)的基团。