6-chloro-3-methyl-3,4-dihydro-2H-1,4-benzoxazine

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: Using the method of Example 1, diethyl ethoxymethylene malonate is reacted with 6-chloro-3,4-dihydro-3-methyl-2H-1,4-benzoxazine and the product reacted with polyphosphoric acid to provide ethyl 8-chloro-2,3-dihydro-3-methyl-7-oxo-7H-pyrido[1,2,3-de]-1,4-benzoxazine-6-carboxylate, m.p. 205°-206° C.