The catalytic asymmetric synthesis of an axially chiral biaryl, potentially useful intermediate in the synthesis of dibenzocyclooctadiene lignans, has been performed. The key step consisted of a diastereoselective Suzuki coupling between a chiral benzylic alcohol and a sterically hindered boronic ester. The 1,3-induction from the benzylic stereocenter to the biaryl axis proceeded with very good diastereoselectivity.
已经进行了轴向手性联芳基的催化不对称合成,该联芳基是二苯并
环辛二烯木脂素合成中潜在有用的中间体。关键步骤包括手性
苯甲醇和空间位阻
硼酸酯之间的非对映选择性 Suzuki 偶联。从苯甲基立构中心到联芳基轴的 1,3-诱导以非常好的非对映选择性进行。