(2R,3S,5R)-5-[(1S,2S)-2-acetylamino-1-hydroxy-3-(3-hydroxyphenyl)-propyl]-2-(2,2-dimethylpropoxy)-3-methylmorpholine-4-carboxylic acid benzyl ester trifluoroacetate 、
溴甲基环丙烷 在
caesium carbonate 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
反应 18.0h,
生成
N-{(S)-2-(3-cyclopropylmethoxy-phenyl)-1-[(1S,5S,6R,8aR)-6-(2,2-dimethyl-propoxy)-5-methyl-3-oxo-tetrahydro-oxazolo[4,3-c][1,4]oxazin-1-yl]-ethyl}-acetamide