Palladium-catalyzed vicinal amino alcohols synthesis from allyl amines by in situ tether formation and carboetherification.

Angew Chem Int Ed Engl

Laboratory of Catalysis and Organic Synthesis, Ecole Polytechnique Fédérale de Lausanne, EPFL SB ISIC LCSO, BCH 4306, 1015 Lausanne (Switzerland) http://lcso.epfl.ch/

Published: April 2015

AI Article Synopsis

  • Vicinal amino alcohols are key components in bioactive compounds and can be efficiently synthesized using a palladium-catalyzed process involving allylic amines.
  • The method ensures high regio- and stereoselectivity by forming a hemiaminal tether from inexpensive trifluoroacetaldehyde in its hemiacetal form.
  • The resulting compounds are versatile building blocks that can be easily modified to produce free alcohols, amines, or terminal alkynes.

Article Abstract

Vicinal amino alcohols are important structural motifs of bioactive compounds. Reported herein is an efficient method for their synthesis based on the palladium-catalyzed oxy-alkynylation, oxy-arylation, or oxy-vinylation of allylic amines. High regio- and stereoselectivity were ensured through the in situ formation of a hemiaminal tether using the cheap commercially available trifluoroacetaldehyde in its hemiacetal form. The obtained compounds are important building blocks, which can be orthogonally deprotected to give either free alcohols, amines, or terminal alkynes.

Download full-text PDF

Source
http://dx.doi.org/10.1002/anie.201500636DOI Listing

Publication Analysis

Top Keywords

vicinal amino
8
amino alcohols
8
palladium-catalyzed vicinal
4
alcohols synthesis
4
synthesis allyl
4
allyl amines
4
amines situ
4
situ tether
4
tether formation
4
formation carboetherification
4

Similar Publications

Bifunctional Azido(thio)ureas from an -Protected 2-Amino-2-deoxy-d-glucopyranose: Synthesis and Structural Analyses.

Molecules

November 2024

Departamento de Química Orgánica e Inorgánica, Facultad de Ciencias, and Instituto del Agua, Cambio Climático y Sostenibilidad (IACYS)-Unidad de Química Verde y Desarrollo Sostenible, Universidad de Extremadura, 06006 Badajoz, Spain.

This publication reports a facile and convenient preparation of tri--acetyl-glucopyranoses, derived from the corresponding 2-deoxyaminosugar, where the vicinal anomeric and C2 positions are decorated by azido and (thio)ureido groups, respectively. This double functionalization leads to an inherently chiral core incorporating the versatile azido and (thio)ureido linkages prone to further manipulation. The latter also provides a structural element for hydrogen-bonded donor-acceptor (HB-DA) sites, which are of immense value in organocatalytic pursuits.

View Article and Find Full Text PDF

Enantioenriched unsymmetrical vicinal diamines are important basic structural motifs. While catalytic asymmetric intermolecular 1,2-diamination of carbon-carbon double bonds represents the most straightforward approach for preparing enantioenriched vicinal-diamine-containing heterocycles, these reactions are often limited to the installation of undifferentiated amino functionalities through metal catalysis and/or the use of stoichiometric amounts of oxidants. Here, we report organocatalytic enantioselective unsymmetrical 1,2-diaminations based on the rational design of a bifunctional 1,2-diamination reagent, namely, azocarboxamides (ACAs).

View Article and Find Full Text PDF

Enantioselective Intramolecular Oxidative Aminoacetoxylation from Aryl-Substituted Alkene via Chiral Triazole-oxazoline Palladium Complexes.

Org Lett

November 2024

State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, Jilin 130012, China.

Here, we describe an enantioselective intramolecular oxidative aminoacetoxylation reaction using a palladium catalyst and an aryl-substituted internal alkene compound as the substrate under mild conditions in several hours. The triazole-oxazoline ligand was selected for the asymmetric catalyst. A range of enantioenriched pyrrolidine-derived vicinal amino acetate compounds were synthesized, showing yields from 47% to 84%, diastereomer ratios from 57:43 to 95:5, and enantiomer excesses from 67% to 92%.

View Article and Find Full Text PDF

Deciphering the Two-Step Hydride Mechanism of Monoamine Oxidase Flavoenzymes.

ACS Omega

October 2024

Theory Department, Laboratory for Computational Biochemistry and Drug Design, National Institute of Chemistry, Hajdrihova 19, Ljubljana SI-1000, Slovenia.

The complete two-step hydride transfer mechanism of amine oxidation involved in the metabolism of monoamine neurotransmitters was scrutinized by DFT calculations. In living organisms, this process is catalyzed by monoamine oxidase enzymes. Herein, we focus on some intriguing aspects of the reaction that may have been previously noticed but have not been clarified to date.

View Article and Find Full Text PDF

Background: To remain competitive, brewers must innovate by incorporating novel elements beyond traditional styles. Thus, exploring triticale as a modern substitute for barley malt is promising, especially given its higher amylolytic activity compared to barley. This study aimed to assess the impact of substituting up to 50% of barley malt with unmalted triticale on green beer quality, encompassing multiple stages from wort production to primary fermentation at a laboratory scale.

View Article and Find Full Text PDF

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!