Dimethyl Sulfoxide → HCID 59656414, compound

Participants

Reaction Conditions

Reaction Steps

To a −78° C. solution of oxalyl dichloride (85 mg, 0.665 mmol) in CH2Cl2 (10 mL) was added DMSO (104 mg, 1.33 mmol). After stirred at −78° C. for 10 min, a solution of 4-[4-(1-hydroxy-ethyl)-naphthalene-1-sulfonylamino]-piperidine-1-carboxylic acid ethyl ester 38 (180 mg, 0.443 mmol) in CH2Cl2 was added into the mixture by dropwise. The resultant mixture was stirred at −78° C. for another 30 min, then was added triethyl amine (224 mg, 2.22 mmol). The reaction mixture was warmed up to room temperature and stirred for 2 h. The resultant mixture was quenched with saturated ammonium chloride solution and the aqueous layer was extracted with CH2Cl2. The organic extracts were combined, washed with brine and dried over MgSO4. The solution was filtered and concentrated in vacuo to give the crude product. The crude material was purified by Flash column chromatography (CH2Cl2:MeOH) to provide 45 mg of 4-(4-acetyl-naphthalene-1-sulfonylamino)-piperidine-1-carboxylic acid ethyl ester 39 in 25% yield. LCMS showed m/z: 409 (M+H)+.

Provenance & Evidence