反应详情

3-(5-Bromo-3-fluoro-2-methyl-phenyl)-4-hydroxy-8-methoxy-1,8-diaza-spiro[4.5]dec-3-en-2-one (title compound F3) was prepared analogously to the synthesis of 3-(5-bromo-4-fluoro-2-methyl-phenyl)-4-hydroxy-8-methoxy-1,8-diaza-spiro[4.5]dec-3-en-2-one (preparation example P5, step P5.5) starting from (5-bromo-3-fluoro-2-methyl-phenyl)-acetic acid (preparation example P7, step P7.2) by making use of the procedures described under step P5.4 and step P5.5. The title compound F3 was obtained as a solid.