Lithiation of 2,4,4,6-Tetramethyl-5,6-dihydro-l,3-oxazine

Derivatization reactions with butyl bromide and trimethylchlorosilanc. 

Meyers et al. dry the starting compound over anhydrous potassium carbonate. We found subsequent treatment of the ethereal solution of the dihydrooxazine with machine-powdered KOH to be necessary. 

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