Cooperation between isothiourea and Pd catalysts enables the preparation of anti-aldol products via enantioselective alkylation of esters with oxyallenes. Key to the successful development of this method was the recognition that Pd−H intermediates could be leveraged within this cooperative framework giving access to oxygen-substituted π(allyl)Pd intermediates. Preliminary deuterium-tracking experiments
异
硫脲和 Pd 催化剂之间的合作使得通过酯与氧
丙二烯的对映选择性烷基化制备抗醛醇产物成为可能。该方法成功开发的关键是认识到可以在这种合作框架内利用 Pd-H 中间体,从而获得氧取代的 π(烯丙基)Pd 中间体。初步的
氘跟踪实验支持所提出的反应途径。