4-Toluenesulfonyl chloride → HCID 87946725, compound

Participants

Reaction Conditions

Reaction Steps

To 5.47 g of 16-butoxycarbonyl-10, 13,16-tri(p-toluenesulfonyl)-10, 13,16-triazahexadecanol in 200 ml of CH2Cl2, 2.95 g of Et3N was added and the mixture was cooled to 0° C. To the well stirred solution was added dropwise at 0° C. 0.22 g of 4-dimethylaminopyridine and then 1.67 g of p-toluenesulfonyl chloride in 100 ml of CH2Cl2 was added. The reaction was continued overnight at room temperature. A 0.04 g amount of 4-dimethylaminopyridine and 0.33 g of p-toluenesulfonyl chloride were added at 7° C. and stirring was continued for 4 hours. The mixture was extracted with water twice. The organic layers were dried over MgSO4, filtered and evaporated under reduced pressure and eluted with CH2Cl2 and CH2Cl2/ethyl acetate (100/1 v/v). About 4.21 g of product was obtained. The preparation scheme is shown below:

Provenance & Evidence