Cyclic and acyclic products from the addition of 1-aza-allyl anions to dienes and α,β-unsaturated ketones - regioselectivity
作者:Stefan Wegmann、Ernst-Ulrich Wu¨rthwein
DOI:10.1016/s0040-4039(00)60574-9
日期:1993.1
Addition of 1-aza-allyl-lithium compound 1 to isoprene at low temperature yields two regioisomeric Γ, δ-unsaturated imines 3, whereas at THF reflux temperature the cyclic regioisomeric cyclohexene derivatives 4 are formed. With 2, 3-dimethylbutadiene, the acyclic products 6 are obtained. C-C-bond formation also takes place with methylvinylketone, leading to the acyclic regioisomers 7, 8 from 1, 2-