苯达松 、
potassium tert-butylate 、
methyl chlorothioformate 在
甲醇 作用下,
以
乙腈 为溶剂,
反应 16.5h,
以to afford 21.7 g of analytically pure S-methyl 3,4-dihydro-3-(1-methylethyl)-4-oxo-1H-2,1,3-benzothiadiazine-1-carbothioate-2,2-dioxide, m.p. 125°-127° C.的产率得到S-methyl 3,4-dihydro-3-(1-methylethyl)-4-oxo-1H-2,1,3-benzothiadiazine-1-carbothioate-2,2-dioxide