A complex situation: Asymmetric epoxidation of conjugated olefins was achieved at room temperature using ruthenium complex 1 as the catalyst and air as the oxidant to give epoxides in up to 95 % ee (see scheme). When the product was acid sensitive, the reaction was carried out at 0 °C under oxygen.

中文翻译：

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共轭烯烃与双氧的不对称环氧化

复杂的情况：使用钌配合物1作为催化剂，空气作为氧化剂，在室温下实现了共轭烯烃的不对称环氧化，生成的环氧化物含量高达95％  ee（参见方案）。当产物对酸敏感时，反应在0℃在氧气下进行。