[2] Ber. 6, 1210 (1873); 13, 1706 (1880); 42, 3233 (1909); Ann.
208, 355 (1881); 269, 46 (1892); Ann. chim. phys. (6) 9, 145
(1886); Bull. soc. chim. (2) 36, 19 (1881).

[3] Ann. 192, 93 (1878).

[4] Compt. rend. 94, 1428 (1882).

[5] Ann. 269, 18 (1892).

[6] Ber. 43, 3533 (1910).




V

_p_-DIMETHYLAMINOBENZALDEHYDE

(CH3)2NC6H5 + HNO2--> (CH3)2NC6H4NO + H2O (CH3)2NC6H4NO + 2HCHO
+ 2C6H5N(CH3)2 --> (CH3)2NC6H4N
= CHC6H4N(CH3)2 + 2H2) + (CH3)2NC6H4CHO
(CH3)2NC6H4N = CHC6H4N(CH3)2 + HCHO-->( CH3)2NC6H4N = CH2 + (CH3)2NC6H4CHO

Prepared by ROGER ADAMS and G. H. COLEMAN. Checked by H. T. CLARKE
and W. W. HARTMAN.

1. Procedure

IN a 3-l. round-bottom flask fitted with a mechanical stirrer 150 g.