This high basicity is hypothesized to be due to the loss of electron delocalization when the amide bond is twisted—this causes misalignment of the pi orbitals, resulting in loss of electron resonance.
The elevated basicity of this compound is thought to arise from the disruption of electron delocalization that occurs when the amide bond is distorted, leading to a mismatch between the pi orbitals and subsequently, a reduction in electron resonance.