| abstract |
Selective blocking of some amino groups in a polyaminoorganic compound having at least one pair of available neighboring hydroxyl and amino groups is effected by first preparing in situ transition metal salt complexes of available neighboring amino and hydroxyl group pairs in said polyamino-organic compound, followed by introduction of blocking groups of the non-complexed amino groups and, finally removing the transition metal cations from the selectively N-blocked polyamino-organic compound complex to obtain a polyamino-organic compound having selectively blocked amino groups; the selective blocking has application in chemical transformations of polyamino compounds, especially carbohydrates and aminocyclitol-aminoglycsides to obtain good yields. |