4-acetoxyazetidin-2-one 4-AA(AOSA)(penem intermediate )

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4-acetoxyazetidin-2-one 4-AA(AOSA)(penem intermediate )
Posting date : Jul 20, 2008
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CAS:[76855-69-1] 4-acetoxyazetidin-2-one ( penem intermediate ) (3R,4R)-4-Acetoxy-3-[(R)-1-(tert-butyldimethylsilyloxy)ethyl]-2-azetidinone Appearance: white or off-white crystal Optical Purity : 99%(ee) Assay : ≥98.5%( external standard method ) Specific optical rotation : [a] 25 D : +46 ~ +49° ( c=0.56 CHCl3 ) Melting point: 104 ~ 108°C

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