Cationic dirhodium carboxylate-catalyzed synthesis of dihydropyrimidones from propargyl ureas
摘要:
Cationic Rh(II) complexes are able to catalyze the regioselective hydroamination of propargyl ureas in a 6-endo fashion. This transformation permits access to interesting substitution patterns of dihydropyrimidines, which have found use as nucleotide exchange factor inhibitors. (C) 2013 Elsevier Ltd. All rights reserved.
Highly selective TFAA-cleavage of tertiary 2,4-dimethoxybenzylamines and its use in the synthesis of secondary amines
摘要:
TFAA-treatment of allylic, propargylic, homopropargylic and some benzylic tert. 2,4-dimethoxybenzylamines leads to highly selective cleavage of their dimethoxybenzylic C-N bonds. The resultant trifluoroacetamides can then readily be converted to the corresponding secondary amines.