Synthesis of tertiary amines by direct Brønsted acid catalyzed reductive amination
作者:Mohanad A. Hussein、An H. Dinh、Vien T. Huynh、Thanh Vinh Nguyen
DOI:10.1039/d0cc02955f
日期:——
reductive amination reaction of carbonyl compounds. Despite developments of numerous new reductive amination methods in the past few decades, this reaction generally requires non-atom-economic processes with harsh conditions and toxic transition-metal catalysts. Herein, we report simple yet practical protocols using triflic acid as a catalyst to efficiently promote the direct reductive amination reactions
CONVENIENT PREPARATION OF SOME<i>N</i>-SUBSTITUTED 1,2,3,4-TETRAHYDROISOQUINOLINES LACKING ELECTRON-DONATING SUBSTITUENTS
作者:Cornelia Locher
DOI:10.1081/scc-100105660
日期:2001.1
N,N-Bis(benzotriazol-1-ylmethyl)-beta -phenylethylamines 3 are cyclised intramolecularly in conc. H2SO4 to the corresponding N-benzotriazol-1-ylmethyl-1,2,3,4-tetrahydroisoquinolines 4. The remaining benzotriazolyl-moiety can be replaced by nucleophiles, leading to N-substituted 1,2,3,4-tetrahydroisoquinolines 5-8.