4-Toluenesulfonyl chloride → HCID 87818391, compound

Participants

Reaction Conditions

Reaction Steps

3β-tert-Butyldimethylsilyloxy-4,4-dimethyl-5α-chola-8,14-dien-24-ol (4.0 g) is dissolved in 80 ml of dry pyridine at 0° C. 3.04 g of p-toluenesulphonyl chloride is added and the mixture is stirred at 5° C. for 20 hours and at room temperature for 5 hours. After aqueous work-up and crystallisation from methanol, 3.01 g of 3β-tert-butyldimethylsilyloxy-4,4-dimethyl-24-p-toluenesulphonyloxy-5α-chola-8,14-diene is obtained.

Provenance & Evidence