allyl 6-{[(2R,3S)-3-((1R)-1-{[tert-butyl(dimethyl)silyl]oxy}ethyl)-4-oxoazetidin-2-yl]acetyl}-3-oxo-2,3-dihydro-4H-1,4-benzoxazin-4-carboxylate 、
allyl glyoxalate dihydrate 以
甲苯 为溶剂,
反应 2.0h,
生成 allyl {(2R,3S)-2-[2-(4-(allyloxycarbonyl)-3-oxo-2,3-dihydro-4H-1,4-benzoxazin-6-yl)-2-oxoethyl]-3-((1R)-1-{[tert-butyl(dimethyl)silyl]oxy}ethyl)-4-oxoazetidin-1-yl}acetate