A Remarkable Titanium-Catalyzed Asymmetric Strecker Reaction using Hydrogen Cyanide at Room Temperature
作者:Balamurugan Ramalingam、Abdul Majeed Seayad、Li Chuanzhao、Marc Garland、Kazuhiko Yoshinaga、Manabu Wadamoto、Takushi Nagata、Christina L. L. Chai
DOI:10.1002/adsc.201000462
日期:2010.9.10
Close to perfect enantioselectivity (up to 98% ee) is obtained for the formation of amino nitriles using hydrogen cyanide (HCN) as the cyanide source at room temperature for the first time. In an operationally simple process, the catalyst generated from a partially hydrolyzed titanium alkoxide (PHTA) and (S)‐N‐salicyl‐β‐amino alcohol ligand, catalyzes the cyanation of imines in a short reaction time
首次在室温下使用氰化氢(HCN)作为氰化物源,获得接近理想的对映选择性(最高98%ee)用于形成氨基腈。在操作简单的过程中,部分水解的烷氧基钛(PHTA)和(S)-N-水杨基-β-氨基醇配体产生的催化剂可在短反应时间内催化亚胺的氰化反应。