反应详情

In substantially the same manner as in Example 5, morpholine (278 μl) was condensed with Boc-p-fluoro-L-phenylalanine (900 mg, manufactured by Bachera Fein Chemikalien AG, Switzerland) to give N-(Boc-p-fluoro-L-phenylalanyl)morpholine (1.02 g) as a white powder (yield 91%). After Boc group elimination with 4N HCl/ethyl acetate, the product was condensed with (2S,3S)-ethyl hydrogen trans-epoxysuccinate as obtained in Reference Example 8 (333 mg) to yield the title compound (compound 69; 520 mg) as a white powder (yield 63%).