[S:1]1(=[O:7])[CH:5]=[CH:4][C:3](=[O:6])[NH:2]1.[CH3:8][C:9]([C:11]([CH3:13])=[CH2:12])=[CH2:10].CCCCCC>C(Cl)CCl>[CH3:8][C:9]1[CH2:10][CH:4]2[C:3](=[O:6])[NH:2][S:1](=[O:7])[CH:5]2[CH2:12][C:11]=1[CH3:13]To a solution of 2.2 g (0.02 mole) of 4-isothiazolin-3-one 1-oxide in 50 ml of ethylene dichloride is added 2.0 g (0.024 mole) of 2,3-dimethyl-1,3-butadiene. The mixture is stirred and maintained at 60° C. overnight. Concentration of the mixture yields a thick oil, which affords a white solid on trituration with hexane. The solid is filtered and air dried to yield 3.4 g (90%) or product, m.p. 135°-137° C. which can be recrystallized from ethyl acetate-hexane.
불러오는 중…