Actually the reaction of a benzylic amino alcohol, such as the pseudo(ephedrine), reacts with the Lucas reagent (zncl+Hcl ) to chlorinate the OH in the amino alcohol also the reductive dehalogenation of the said chloroephedrine occurs either under catalytic hydrogenation or a metal reduction , although I 've seen the use of zn,Hg/al, but not sure of the final verdict on the reductive dehalogenation with zncl ........java