Efficient Synthesis of 6-Trimethylsiloxy- and 6-(Trimethylsilyl)-methyl-3-phenyl-5, 6,dihydro-4H-1,2-oxazines by Cycloaddition of α-Nitrosostyrene to Silyl Enol Ethers and Allyltrimethylsilane - Hippeli, Claudia; Reissig, Hans-Ulrich (Synthesis, 1987)