Stereoselective C(sp3)-C(sp2) Negishi coupling of (2-amido-1-phenylpropyl)zinc compounds through the steric control of β-amido group
作者:Shi Tang、ShuHua Li、Dong Zhou、HuiQiong Zeng、NaiXing Wang
DOI:10.1007/s11426-013-4880-2
日期:2013.9
A controllable diastereoselective C(sp2)-C(sp3) Negishi coupling reaction of secondary benzylic zinc reagents with aryl bromides has been demonstrated for the first time, forming medicinally important 1-arylphenylethylamines. In the presence of Pd(OAc)2 and S-phos, open-chain (2–amido-1-phenylethyl)zinc reagents bearing a β-NHAc or NHCHO group underwent cross-coupling reaction to give syn 1-arylphenylethylamine
辅助苄基锌试剂与芳基溴化物的可控制的非对映选择性C(sp 2)-C(sp 3)Negishi偶联反应已得到首次证明,形成了医学上重要的1-芳基苯基乙胺。在存在Pd(OAc)2和S-phos的情况下,带有β-NHAc或NHCHO基团的开链(2-酰胺基-1-苯基乙基)锌试剂发生交叉偶联反应,以 合成 1-芳基苯基乙胺 为主要成分产物,而带有空间位阻的β-NHCOC(CH 3)2 OTBS基团的锌试剂则特别产生了 抗 1-芳基苯基乙胺 。