THE REACTION OF DICOUMAROL WITH ANILINE

Dicoumarol [1] has been reported to yield 2 mol of 4-anilidocoumarin [ 2] (the anil of 4-hydroxycoumarin) when allowed to react with aniline. It is now shown that only 1 mol of 4-anilidocoumarin is formed, with the rest of the molecule being converted into a new compound, 1,4-dihy dro-1-benzaz[3,2-c]-1,2-benzopyrone [3] (meancoumarin). The spectral p roperties of 3 are reported and compared to those of 2, as well as to two other synthetic anils 4 and 5.