H. Mrozik et al., 4''-DEOXY-4''-AMINOAVERMECTINS WITH POTENT BROAD-SPECTRUM ANTIPARASITIC ACTIVITIES, Bioorganic & medicinal chemistry letters, 5(20), 1995, pp. 2435-2440
Reductive amination of 4''-oxo-5-O-tert-butyldimethylsilyl-avermectins
with sodium cyanoborohydride and ammonium acetate gave an epimeric mi
xture of 4''-deoxy-4''-amino analogs with the epimeric, axial 4''-beta
-amino derivative as the major component. Acylation of the amino subst
ituent gave highly active broad spectrum antiparasitic compounds, as d
etermined in a sheep anthelmintic assay. 4''-Epi-acetylamino-4''-deoxy
avermectin B-1(12) was selected for further antiparasitic studies and
is currently under development as a novel avermectin endectocide.