abstract |
(57) [Problem] To provide a novel and useful 3,3-difluoroalanine derivative. SOLUTION: General formula (1) (Wherein, R 1 , R 2 , and R 3 are a hydrogen atom, a substituted or unsubstituted alkyl group or an aryl group, and X is Cl, B or a 3-halo-3,3-difluoroalanine derivative represented by the formula: |