A very good control of the regioselectivity occurs in the deprotonatio
n of imino derivatives of bis(trimethylsilyl) methylamine (BSMA) follo
wed by quenching with electrophiles. Functionalization at C-1, C-3 or
C-4 takes place selectively depending on the nature of the electrophil
e and of the base employed. This methodology provides an entry to a wi
de class of novel, functionalized, silylated imino derivatives.