Enantioselective Strecker Reaction of Phosphinoyl Ketoimines Catalyzed by in Situ Prepared Chiral <i>N</i>,<i>N</i>‘-Dioxides
作者:Jinglun Huang、Xiaohua Liu、Yuehong Wen、Bo Qin、Xiaoming Feng
DOI:10.1021/jo062006y
日期:2007.1.1
The enantioselective Strecker reaction of N-diphenylphosphinoyl ketoimines has been achieved by use of in situ prepared chiral N,N‘-dioxide catalyst from l-piperidinamide 3f and m-chloroperoxybenzoic acid (m-CPBA). Excellent yields (up to 99%) and high enantioselectivities (up to 92% ee) were obtained. In particular, in situ prepared catalyst with readily available chiral material made the procedure
的对映选择性的Strecker反应Ñ -diphenylphosphinoyl酮亚胺已经通过使用原位制备的手性实现Ñ,ñ ' -从氧化钛催化剂升-piperidinamide 3F和中号氯过氧苯甲酸(米-CPBA)。获得了极好的收率(高达99%)和高的对映选择性(高达92%ee)。特别地,具有容易获得的手性材料的原位制备的催化剂使该过程更方便。此外,l-哌啶酰胺3f衍生的N,N'-二氧化物9 可以循环使用至少五次,而不会损失催化活性或对映选择性。