Methyl iodide → (S)-3-Methylthio-1,5,10,10a-tetrahydrothiazolo[3,4-b]isoquinolinium iodide

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Reaction Steps

(S)-1,5,10,10a-Tetrahydrothiazolo[3,4-b]isoquinoline-3-thione (38 g) is dissolved in methyl iodide (500 cc). After 15 hours at a temperature of 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 (1 mm Hg). (S)-3-Methylthio-1,5,10,10a-tetrahydrothiazolo[3,4-b]isoquinolinium iodide (61.5 g), which melts at 140°-150° C. with decomposition, is thus obtained.

Provenance & Evidence