The scope with respect to triazinanes was further explored under condition A. Several other N-benzyl triazinanes bearing an electron-donating (methoxy), electron-withdrawing (bromo) or heteroaromatic (thiophene) group were well-tolerated, affording the desired products in 55% (3t), 60% (3u) and 33% (3v) yields, respectively. N-alkyl congeners, such as N-isopropyl and Ncyclopropyl ones, worked well to furnish the target aza-BCOs in good yields (3w 68% and 3x 62%). Notably, the N-propargyl triazinane was also a viable reaction partner, giving rise to the expected product 3y with high degrees of molecular complexity in 50% yield.