5-hydroxymethyl-5-methyl-4,5-dihydrothieno[2,3-b]thiophene-2-sulfonamide-6,6-dioxide 、 (-)-5(R)-(N,N-Dimethylcarbamoyl)-5-methyl-4,5-dihydrothieno[2,3-b]thiophene-2-sulfonamide-6,6-dioxide 以
四氢呋喃 为溶剂,
以99%的产率得到(+)-5(R)-(N,N-dimethylaminomethyl)-5-methyl-4,5-dihydrothieno[2,3-b]thiophene-2-sulfonamide-6,6-dioxide hydrochloride