(R)-3-(2-amino-2-phenylethyl)-1'-(3-chlorobenzyl)-1-(2-fluoro-6-(trifluoromethyl)benzyl)-6,7-dihydrospiro[cyclopenta[d]pyrimidine-5,4'-piperidine]-2,4(1H,3H)-dione 、
(R)-tert-butyl (2-(1'-((5-bromofuran-2-yl)methyl)-1-(2-fluoro-6-(trifluoromethyl)benzyl)-2,4-dioxo-1H-spiro[furo[3,4-d]pyrimidine-5,4'-piperidin]-3(2H,4H,7H)-yl)-1-phenylethyl)carbamate 以to obtain the title compound as white foam (34.8 mg, yield: 64.2%)的产率得到(R)-3-(2-amino-2-phenylethyl)-1'-((5-bromofuran-2-yl)methyl)-1-(2-fluoro-6-(trifluoromethyl)benzyl)-1H-spiro[furo[3
,4-d]pyrimidine-5
,4'-piperidine]-2,4(3H,7H)-dione