A naphthalene derivative of the formula:
wherein R1 is hydrogen and R2 is lower alkyl or phenyl-lower alkyl; or R' and R2 are combined together to form lower alkylene; X is halogen; and the absolute configuration at the asymmetric carbon atom shown by the asterisk is either (S)-or (R)- configuration, and a method of preparation thereof are disclosed. Said naphthalene derivative is useful as a chiral reagent for determining the optical purity of an optically active compound containing within its molecule at least one functional group selected from hydroxy, amino and imino groups.
式中的
萘衍
生物:
其中 R1 为氢,R2 为低级烷基或苯基-低级烷基;或 R' 和 R2 结合在一起形成低级亚烷基;X 为卤素;星号所示不对称碳原子的绝对构型为 (S)- 或 (R)- 构型,并公开了其制备方法。所述
萘衍
生物可用作手性试剂,用于测定分子中含有至少一个选自羟基、
氨基和亚
氨基的官能团的光学活性化合物的光学纯度。