Pyridine → 4-(6-(Methylsulfonyloxy)benzo(b)thiophen-2-yl)phenyl methanesulfonate

Participants

Reaction Steps

Twenty g. of 6-hydroxy-2-(4-hydroxyphenyl)-benzo[b]thiophene was dissolved in 400 ml. of pyridine, together with 23.4 g. of methanesulfonyl chloride and 50 mg. of 4-dimethylaminopyridine. The mixture was stirred under a nitrogen blanket overnight at ambient temperature, and was then poured into 2 liters of water and stirred vigorously. The solids were collected by filtration, and washed successively with water, methanol and diethyl ether. The washed solids were then vacuum dried at 60° C. to obtain 32.5 g. of the desired intermediate product, m.p. 195°-197° C.

Provenance & Evidence