(R)-tert-butyl (2-(1-(2-fluoro-6-(trifluoromethyl)benzyl)-1'-(3-fluorobenzyl)-2,4-dioxo-1H-spiro[furo[3,4-d]pyrimidine-5 ,4'-piperidin]-3(2H,4H,7H)-yl)-1-phenylethyl)carbamate 、
(R)-tert-butyl (2-(1-(2-fluoro-6-(trifluoromethyl)benzyl)-2,4-dioxo-1,2,6,7-tetrahydrospiro[cyclopenta[d]pyrimidine-5,4'-piperidin]-3(4H)-yl)-1-phenylethyl)carbamate 、
3-氯苄溴 以to obtain the title compound as colorless oil (47 mg, yield: 57%)的产率得到(R)-tert-butyl (2-(1'-(3-chlorobenzyl)-1-(2-fluoro-6-(trifluoromethyl)benzyl)-2,4-dioxo-1,2,6,7-tetrahydrospiro[cyclopenta[d]pyrimidine-5,4'-piperidin]-3(4H)-yl)-1-phenylethyl)carbamate