Benzylic azides are converted into N-methylanilines efficiently in the pres
ence of a Bronsted or Lewis acid and Et3SiH. The combination of SnCl4/Et3Si
H and 4-n-butylbenzyl azide appears to form an aminodiazonium trichlorostan
nate(II), which undergoes the rearrangement to an iminium salt that is then
reduced to N-methyl-4-n-butylaniline by Et3SiH. (C) 1999 Elsevier Science
Ltd. All rights reserved.