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In general, good yields of anilides were obtained when solutions of the Grignard reagents were treated with phenyl isocyanate; therefore, cleavage of 4-methyl-l,3-dioxane, a cyclic formal, by the Grignard reagents could not have occurred in appreciable amount.Further studies of 4-methyl-l,3-dioxane and similar compounds as solvents for the preparation and reactions of Grignard reagents are anticipated. SummarySolutions of several aliphatic and aromatic halides in 4-methyl-l,3-dioxane reacted with magnesium to produce good yields of Grignard reagents. Rochester, N. Y.

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