Enantiomerically enriched α-aryl α-cyanoacetates and α-aryl α-acylacetonitriles bearing a benzylic quaternary stereocenter have been readily synthesized by stereoselective reaction of 2-alkyl-2-[2-(p-tolylsulfinyl)phenyl]acetonitriles with different acylating and alkoxycarbonylating reagents under basic conditions. The stereoselectivity of the reactions proved closely dependent on the nature of the
通过2-烷基-2- [2-(对-
甲苯基亚磺酰基)苯基]
乙腈与不同的酰化和烷氧基羰基化反应的立体选择性反应,可以轻松合成对映体富集的α-芳基α-
氰基
乙酸酯和α-芳基α-酰基
乙腈试剂在基本条件下。事实证明,反应的立体选择性与中间碳负离子种类的性质密切相关,中间碳负离子种类的演化受到亚磺酰基作为远程手性助剂的有效控制。