(3R,4S)-4-((S)-2,2-Dimethyl-[1,3]dioxolan-4-yl)-3-methoxy-1-prop-2-ynyl-azetidin-2-one 在
copper diacetate 、
potassium carbonate 作用下,
以
乙腈 为溶剂,
反应 4.0h,
以100%的产率得到(3R,4S)-4-[(4S)-2,2-dimethyl-1,3-dioxolan-4-yl]-1-[6-[(2S,3R)-2-[(4S)-2,2-dimethyl-1,3-dioxolan-4-yl]-3-methoxy-4-oxoazetidin-1-yl]hexa-2,4-diynyl]-3-methoxyazetidin-2-one