Methyl 7-(4-fluorophenyl)-6,8-dioxo-1,2,7-triazaspiro[4.4]non-2-ene-3-carboxylate 在
溴 作用下,
以
溶剂黄146 为溶剂,
生成 (1S,3S)-1-Bromo-5-(4-fluoro-phenyl)-4,6-dioxo-5-aza-spiro[2.4]heptane-1-carboxylic acid methyl ester 、 (1R,3S)-1-Bromo-5-(4-fluoro-phenyl)-4,6-dioxo-5-aza-spiro[2.4]heptane-1-carboxylic acid methyl ester