Enantioselective addition of Et2Zn to seven‐membered cyclic imines catalyzed by a (R)-VAPOL-Zn(II) complex
作者:Lode De Munck、Verena Sukowski、Carlos Vila、José R. Pedro
DOI:10.1016/j.tetlet.2017.07.042
日期:2017.8
substituted dibenzo[b,f][1,4]oxazepines underwent an enantioselective alkylation with Et2Zn catalyzed by a (R)-VAPOL-Zn(II) complex. The corresponding chiral 11-ethyl-10,11-dihydrodibenzo[b,f][1,4]oxazepine derivatives were obtained with good yields and moderate enantioselectivities. This represents the first example of enantioselectiveaddition of Et2Zn to cyclic aldimines.
Ru-Catalyzed asymmetric transfer hydrogenation of substituted dibenzo[b,f][1,4]oxazepines in water
作者:Ganesh V. More、Bhalchandra M. Bhanage
DOI:10.1039/c7ob01229b
日期:——
is the first report on the asymmetrictransferhydrogenation (ATH) of dibenzo[b,f][1,4]oxazepine compounds in the presence of an (R,R)-Ru-Ts-DPEN complex. The developed catalytic asymmetric protocol provides biologically active 11-substituted-10,11-dihydrodibenzo[b,f][1,4]oxazepines with excellent conversion (up to >99%) and high enantioselectivity (up to 93% ee) in water as an environmentally benign