In this study, a series of A-ring azepano- and 3-amino-3,4-seco-derivatives were synthesized from betulin, oleanolic, ursolic and glycyrrhetinic acids aiming to develop new cholinesterase inhibitors. Azepanobetulin, azepanoerythrodiol and azepanouvaol were modified to give amide and tosyl derivatives, while azepano-anhydrobetulines and azepano-glycyrrhetols were obtained for the first time. Oleanane
Modification of Azepanobetulin at the Isopropenyl Group
作者:A. V. Petrova、T. V. Lopatina、A. G. Mustafin、O. B. Kazakova
DOI:10.1134/s1070428020090134
日期:2020.9
Modification of the isopropenyl group of biologically active azepanobetulin via oxidation with ozone and selenium dioxide, allylic bromination, azidation, amination, reduction, 1,3-dipolar cycloaddition, and Claisen-Schmidt condensation afforded a series of C-30-derivatives with oxygen- and nitrogen-containing aliphatic and heterocyclic substituents.