Hydrochloric Acid → HCID 54303214, compound

Participants

Reaction Steps

623 mg of the alcohol of Step F were dissolved in 8 ml of dichloromethane with 834 mg of tosyl chloride and a solution of 534 mg of 4-dimethylamino-pyridine and 5 ml of dichloromethane was introduced over 20 minutes. After 1 hour of stirring, 2.2 ml of N hydrochloric acid were added with stirring and the decanted organic phase was dried and distilled under reduced pressure. The residue was chromatographed on silica and eluted with dichloromethane ethyl acetate (9-1) and crystallized from ether to obtain 245 mg of 1,1-dimethylethyl 7-[2-(2-tritylaminothiazol-4-yl)-2-methoxyimino-acetamido]-8-oxo-3-chloromethyl-4-thia-1-azabicyclo[4,2,0]oct-2-ene-2-carboxylate.

Provenance & Evidence