Scope and limitations in sulfur ylide mediated catalytic asymmetric aziridination of imines: use of phenyldiazomethane, diazoesters and diazoacetamides†
作者:Varinder K. Aggarwal、Marco Ferrara、Christopher J. O'Brien、Alison Thompson、Ray V. H. Jones、Robin Fieldhouse
DOI:10.1039/b102578n
日期:——
Imine aziridination using diazo-compounds and catalytic quantities of metal salts and sulfides has been investigated. A range of imines derived from benzaldehyde bearing electron-withdrawing groups (N-Ts, N-SO2CH2CH2SiMe3 (SES), N-P(O)Ph2, N-CO2Bn, N-CO2But, N-CO2(CH2)2SiMe3, N-CO2C(CH3)2CCl3) were prepared and tested in the aziridination process using Me2S and phenyldiazomethane. High yields were
已经研究了使用重氮化合物的亚胺叠氮和催化量的金属盐和硫化物。一系列具有吸电子基团的苯甲醛衍生的亚胺(N -Ts,N -SO 2 CH 2 CH 2 SiMe 3(SES),N -P(O)Ph 2,N -CO 2 Bn,N -CO 2卜吨,ñ -CO 2(CH 2)2森达3,ñ -CO 2 C(CH 3)制备2 CCl 3),并使用Me 2 S和苯基重氮甲烷在叠氮化过程中进行测试。所有亚胺均获得高产,但非对映选择性差异很大(3:1–> 10:1)。用化学计量的硫化物测试了一系列N -SES亚胺,芳族和脂族亚胺均获得了高收率。随后用化学计量和亚化学计量的对映体纯的1,3-氧杂蒽3与Rh 2(OAc) 4和Cu(acac) 2来测试这些亚胺。Rh 2(OAc) 4的收率高,对映选择性高(89–95%),尽管使用Cu(acac)2(85-95%)观察到对映体过量有小幅减少,尤其是当使用亚化学计量的