反应详情

Diphenyl chlorophosphate (10.9 microliter, 52.6 micromol) was added to a stirred, 0° C. solution of a p-nitrobenzyl 2-oxo-carbapenam-3-carboxylate (15.4 mg, 50.6 micromol), 4-dimethylaminopyridine (1.3 mg, 11 micromol), and diisopropylethylamine (10.4 microliter, 59.7 micromol) in anhydrous acetonitrile (500 microliter). After 5 min., potassium azide (12.6 mg, 155 micromol), and 1,4,7,10,13,16-hexaoxacyclooctadecane (13.3 mg, 50.3 micromol) were added. After an additional 5 min. the mixture was washed three times with water, dried over anhydrous magnesium sulfate, filterd, and evaporated under vacuum. The residue was applied to one 20 cm×20 cm 250 micron silica gel preparative thin layer chromatography plate and developed with diethyl ether. Elution with ethyl acetate and evaporation of the eluate under vacuum provided 3.2 mg (19%) p-nitrobenzyl 2-azido-carbapen-2-em-3-carboxylate.

1. washAfter an additional 5 min. the mixture was washed three times with water
2. dry with materialdried over anhydrous magnesium sulfate, filterd
3. customevaporated under vacuum
4. washElution
5. customwith ethyl acetate and evaporation of the eluate under vacuum