Synthesis of s-Benzyldipheny1amidines.-Limpricht (AnnaZen, 1865,135,82 ; cf. Doebner, Ber., 1882,15, 233 ; Annalen, 1883, 217, 241) found that s-benzenyldiphenylamidine could be obtained directly from benzotrichloride and aniline, but, although the usual methods for the production of amidines involve two or three stages from the initial amines, this reaction does not seem to have been further investigated, possibly because it tends to be vigorous unless properly controlled. It has now been found that, in presence of nitrobenzene, benzotrichloride reacts smoothly with a number of primary arylamines to give the corresponding s-benzyldiphenylamides in yields which range up to 85 yo. s-Benzenyldi-pand -m-nitrophenyl-, -m-tolyl-, -p-chlorophenyl-, and -s-tribromophenyl-amidine have thus been prepared, but satisfactory results could not be obtained with benzidine, m-nitrop-toluidine, o-nitro$-toluidine, p-nitro-o-toluidine, and 2 : 4-dinitroaniline. With o-

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