p-Toluenesulfonic acid → HCID 66649236, compound

Participants

Reaction Steps

A mixture of 50 (4.30 g, 7.33 mmol), TsOH (catalytic amount), and triethylorthoformate (90 mL) was stirred at room temperature for 24 hr, concentrated, and the residue purified on a silica gel column (CHCl3:MeOH=30:1 v/v) to give compound 51 (2.20 g, 50%).

Provenance & Evidence