Methyl iodide → (RS)-3-Methylthio-9,9a-dihydrothiazolo[3,4-a]indolium iodide

Participants

Reaction Conditions

Reaction Steps

Methyl iodide (40 cc) is added to a solution of (RS)-9,9a-dihydrothiazolo[3,4-a]indole-3-thione (30.0 g) in methylene chloride (150 cc). After stirring for 20 hours at about 20° C., the resulting crystals are filtered off, washed with diethyl ether (2×50 cc) and then dried at 20° C. under reduced pressure (20 mm Hg). (RS)-3-Methylthio-9,9a-dihydrothiazolo[3,4-a]indolium iodide (50.2 g), melting at 135°-140° C. with decomposition, is thus obtained.

Provenance & Evidence