Hydroformylation of Alkenylamines. Concise Approaches toward Piperidines, Quinolizidines, and Related Alkaloids
作者:Etienne Airiau、Nicolas Girard、Marianna Pizzeti、Jessica Salvadori、Maurizio Taddei、André Mann
DOI:10.1021/jo101776y
日期:2010.12.17
Linear hydroformylation of N-protected allyl- or homoallylamines (cyclohydrocarbonylation: CHC), followed by a reductive amination constitute the two key steps toward convenient routes to aza-heterocycles.
High regioselectivity in electrochemical α-methoxylation of N-protected cyclic amines
作者:Samuel S. Libendi、Yosuke Demizu、Yoshihiro Matsumura、Osamu Onomura
DOI:10.1016/j.tet.2008.02.060
日期:2008.4
N-Protecting groups of alpha-substituted cyclic amines strongly affected the regioselectivity in electrochemical methoxylation of these compounds. Namely, N-acyl derivatives were transformed into alpha'-methoxylated compounds, while N-cyano derivatives changed into alpha-methoxylated derivatives. Furthermore, Lewis acid catalyzed nucleophilic substitution of the alpha-methoxylated compounds protected with cyano group afforded alpha,alpha-disubstituted cyclic amines. (c) 2008 Elsevier Ltd. All rights reserved.
Fragment-oriented synthesis: β-elaboration of cyclic amine fragments using enecarbamates as platform intermediates
作者:Alexandre F. Trindade、Emily L. Faulkner、Andrew G. Leach、Adam Nelson、Stephen P. Marsden
DOI:10.1039/d0cc03934a
日期:——
for the β-sp3 functionalisation of cyclic amines is described. Regioselective conversion of protected amines to enecarbamates is achieved through electrochemical oxidation; these intermediates can be derivatised by functionalised alkyl halides under photoredox catalysis. The potential of the methods is highlighted by direct growth of a DCP2B-binding fragment.