A bifunctional chiral thiourea―tertiary amine organocatalyst derived from cinchonine was employed to promote the enantioselective Friedel―Crafts alkylation of sesamol and 2-substituted sesamols with various aromatic nitro olefins. The reactions proceeded smoothly to provide the corresponding products in good yields (up to 97 %) and good enantioselectivities (up to 90 % ee).
使用衍生自
辛可宁的双功能手性
硫脲-叔胺有机催化剂促进
芝麻酚和2-取代
芝麻酚与各种芳族硝基烯烃的对映选择性Friedel-Crafts烷基化反应。反应顺利进行,以良好的产率(高达 97%)和良好的对映选择性(高达 90% ee)提供相应的产物。