A critical step for hydroxylation to cyclohexane ring at the 10 alpha orientation of an intermediate to tetrodotoxin was achieved through a limited precursor by allylic oxidation with SeO2. In all the cases stereocontrol was rendered by strictly stereoelectronic and steric effects to give exact products.
通过用
硒氧化物对烯丙基进行氧化,在中间产物对
河豚毒素的10α位进行羟基化以形成
环己烷环的关键步骤得以实现。在所有情况下,通过严格的立体电子效应和立体效应来控制立体结构,从而得到精确的产品。