((S)-1-amino-6-nitro-indan-1-yl)-acetic acid methyl ester 、
N-BOC-N'-甲基硫脲 以the product tert-butyl[(1S)-1′-methyl-6-nitro-6′-oxo-2,3,5′,6′-tetrahydro-1′H-spiro[indene-1,4′-pyrimidin]-2′-yl]carbamate was obtained as pale brown solid的产率得到tert-butyl [(1S)-1'-methyl-6-nitro-6'-oxo-2,3,5',6'-tetrahydro-1'H-spiro[indene-1,4'-pyrimidin]-2'-yl]carbamate