Pyridine → 1-Chloro-4-{[2-(chloromethyl)phenyl]sulfanyl}-2-methoxybenzene

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Reaction Steps

Thionyl chloride (6.5 g) is added dropwise to a stirred mixture of the alcohol from the preceding preparation (11.2 g) and pyridine (4.0 g) at 10°-20° C. The mixture is stirred at room temperature for 3 hours and, after standing overnight, for one additional hour at 30°-40° C. The cooled mixture is decomposed by dropwise addition of water (20 ml) and the product extracted with benzene. The work-up of the extract, followed by crystallization of the crude residue from a small volume of hexane, yields 10.2 g (85%) of 2-(4-chloro-3-methoxyphenylthio)benzyl chloride which in the pure state melts at 57°-59° C.

Provenance & Evidence