Carbapenem bicyclic nucleus preparation and purification method
A carbapenem bicyclic nuclei and purification method technology, applied in the direction of organic chemistry, can solve the problems of excessive heavy metal content, affecting the quality of drugs, and no rhodium removal method, etc., to achieve simple operation, cheap reagents, and environmental friendliness Effect
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Embodiment 1
[0025] In a 500ml three-necked flask, add 37.6g (0.1mol) (3S, 4R)-3-[(1R)-hydroxyethyl]-4-[3-(4-nitrobenzyloxy)carbonyl-2-oxo Substitute-3-diazopropyl]azetidinyl-2-one, 300ml ethyl acetate, nitrogen gas for 5min, add 0.39g rhodium octanoate, react at 50°C for 3-4 hours, HPLC detection complete reaction, cooling To room temperature, add 300ml of 5% TMT (pH=7.5~8.0) aqueous solution, stir at room temperature for 30min, static layering, ethyl acetate phase was washed with 200ml of water, dried with anhydrous MgSO4, concentrated ethyl acetate under reduced pressure at less than 50°C The ester liquid was about 100ml, cooled to room temperature, added 300ml of isopropyl ether, a white solid was precipitated, filtered, and the filter cake was dried under vacuum and reduced pressure at 30-40°C to obtain 33.0g of carbapenem bicyclic nuclei, yield 94.8% , HPLC normalization method to determine the content of 98.7%, ICP-MS method to determine the rhodium content of 0.6ppm
Embodiment 2
[0027] Except replacing rhodium octanoate with rhodium acetate, the consumption of rhodium acetate is 0.22g, other operating conditions are all the same as Example 1, obtain white solid 30.1g, yield 86.5%, HPLC normalization method determines content 99.1%, ICP-MS Determination of rhodium content 0.4ppm.
Embodiment 3
[0029] Except that the consumption of rhodium octoate is 0.20g, other operating conditions are all the same as in Example 1, and 28.6g of white solid is obtained, and the yield is 82.2%. .
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