The stereoselective synthesis of 2-bromo-6-chloro-5-methylcyclohex-4-ene-1,3-diyl diacetate, methyl-substituted dihaloconduritol-A is reported. Bromination of 2-methylbenzo-1,4-quinone followed by the reduction in the carbonyl groups with NaBH4 to give a dioldibromo compound. The diol was converted to diacetates by acetylation with Ac2O-pyridine. Reaction of methyl-dioldibromodiacetate with LiOH gave
报道了2-
溴-6-
氯-5-甲基环己-4-烯-1,3-二
乙酸二
乙酸酯,甲基取代的二卤代conduritol-A的立体选择性合成。将2-甲基苯并-1,4-醌
溴化,然后用NaBH 4还原羰基,得到二醇二
溴化合物。通过用Ac 2 O-
吡啶乙酰化将二醇转化为二
乙酸酯。二醇二
溴二
乙酸甲酯与LiOH的反应立体选择得到单
环氧化物。
环氧化物与AcCl在
二氯甲烷中的受控反应提供了所需的新的二卤代conduritol-A衍
生物,其通过光谱法表征。所有合成的化合物均通过FT-IR,1 H-NMR,13 C-NMR,COZY(2D-NMR)和HRMS分析进行表征。