S. Brocherieuxlanoy et al., SYNTHESIS OF NEW TRIALKYLSILYLMETHYLOXAZINONES VIA INTRAMOLECULAR TRAPPING OF BETA-SILYL CARBOCATIONS BY AN N-BOC GROUP, Journal of the Chemical Society. Perkin transactions. I, (15), 1997, pp. 2163-2165
N-Boc amino ethers la-e when treated with allyltrialkylsilanes in the
presence of TiCl4 afford the expected allylation compounds 2a-e and/or
the unprecedented silylated oxazinones 3a-e or 4a-e.