Answers are grounded in this paper and cite their sources.
In the presence of titanium(IV) bromide, N-tosyl aldimines smoothly reacted with ketene bis(trimethylsilyl) acetals at low temperature, and upon esterification anti-β-amino esters were obtained selectively.
No takes yet. Share an insight, caveat, or question.
Shimada et al. (1992) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: