International audienceThe aza-Michael addn. of secondary amines to α,β- or β,β-disubstituted α,β-unsatd. esters was efficiently achieved under high pressure (10-16 kbar) in protic solvents in the absence of any catalyst. The expected cumbersome β-aminoesters bearing a tertiary amine directly connected to a quaternary carbon atom could be isolated in fair to good yields. By using α,β,δ,γ-unsatd. esters (alkyl sorbate), the addn. took place regioselectively in a 1,6 manner and afforded the β,γ-unsatd. δ-aminoesters

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