(1R,5S,6R,11S)-4,5,10,10-tetramethyl-6-phenyl-7,9,13-trioxa-4-azatetracyclo[9.8.0.02,8.014,19]nonadeca-2(8),14,16,18-tetraen-3-one 在
盐酸 作用下,
以
甲醇 为溶剂,
反应 14.0h,
以89%的产率得到(1S,4aS,10bS)-4,4-Dimethyl-2-oxo-1,4a,5,10b-tetrahydro-2H,4H-pyrano[3,4-c]chromene-1-carboxylic acid ((1S,2R)-2-hydroxy-1-methyl-2-phenyl-ethyl)-methyl-amide