Mannich reaction between dimethyl (methylene) ammonium chloride and a silyl enol ether gives a regiochemical result opposite to that obtained from the derived lithium enolate and the same salt. © 1982.
Danishefsky, S., Kahn, M., & Silvestri, M. (1982). An anomalous mannich reaction of a trimethylsilyl enol ether. Tetrahedron Letters, 23(14), 1419–1422. https://doi.org/10.1016/S0040-4039(00)87122-1