Catalytic Asymmetric Addition Reactions of Formaldehyde <i>N</i>,<i>N</i>-Dialkylhydrazone to Synthesize Chiral Nitrile Derivatives
作者:Hang Zhang、Yao Luo、Chenhao Zhu、Shunxi Dong、Xiaohua Liu、Xiaoming Feng
DOI:10.1021/acs.orglett.0c01857
日期:2020.7.2
A number of nitrile-containing chiral molecules were synthesized via asymmetric nucleophilic addition of formaldehyde N,N-dialkylhydrazone as the nitrile equivalent. Chiral N,N′-dioxide/metal salt complexes enabled the asymmetric addition reactions to both isatin-derived imines and α,β-unsaturated ketones, generating amino nitriles and 4-oxobutanenitrile derivatives in good yields with high enantioselectivities
通过不对称的亲核加成甲醛N,N-二烷基alkyl作为腈当量,合成了许多含腈的手性分子。手性N,N′-二氧化物/金属盐配合物能够使不对称的加成反应从伊斯丁衍生的亚胺和α,β-不饱和酮,以高收率和高对映选择性生成氨基腈和4-氧代丁腈衍生物。通过避免使用有毒腈试剂,广泛的底物范围以及将手性ad加合物向其他有价值的分子进行多用途转化,突出了该方案。