Asymmetric hydroamination catalyzed by a new chiral zirconium system: reaction scope and mechanism.

Chem Commun (Camb)

State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry (SIOC), Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, P. R. China.

Published: April 2015

AI Article Synopsis

  • A new type of chiral zirconium complexes was created using chiral tridentate ligands from amino acids.
  • These complexes were analyzed structurally to understand their properties.
  • They effectively catalyzed the transformation of primary aminoalkenes into five- and six-membered N-heterocyclic amines, achieving high enantiomeric excess (up to 94%).

Article Abstract

A new class of chiral zirconium complexes supported by chiral tridentate [O(-)NO(-)]-type of ligands derived from amino acids were synthesized and structurally characterized. They catalyzed asymmetric hydroamination/cyclization of primary aminoalkenes to give five- and six-membered N-heterocyclic amines with up to 94% ee.

Download full-text PDF

Source
http://dx.doi.org/10.1039/c4cc10032hDOI Listing

Publication Analysis

Top Keywords

chiral zirconium
8
asymmetric hydroamination
4
hydroamination catalyzed
4
catalyzed chiral
4
zirconium system
4
system reaction
4
reaction scope
4
scope mechanism
4
mechanism class
4
class chiral
4

Similar Publications

Chiral Supramolecular Proton Conductors: Harnessing Highly Charged Zirconium-Amino Acid Oxo-Clusters.

Inorg Chem

December 2024

Departamento de Química Inorgánica, Facultad de Ciencia y Tecnología, Universidad del País Vasco, UPV/EHU, Apartado 644, E-48080 Bilbao, Spain.

Incorporation of amino acid capping molecules (alanine (Ala), methionine (Met), phenylalanine (Phe), tryptophan (Trp), tyrosine (Tyr), and valine (Val)) in their zwitterionic form into archetypal [Zr(μ-O)(μ-OH)] clusters creates supramolecular frameworks in which the assembly of these highly charged discrete units with chloride counterions provides a unique combination of porosity, chirality, and proton conductivity. The supramolecular frameworks assembled from these cluster entities (i.e.

View Article and Find Full Text PDF

Chiral Metal Self-Assemblies of Zirconium-Tetrahedra and Their Second Harmonic Generation Activity.

Angew Chem Int Ed Engl

October 2024

Hunan Key Laboratory of Micro & Nano Materials Interface Science, College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, China.

The chirality of metal-organic cages holds enormous potential for novel applications in diverse fields, while it is relatively rare to employ such asymmetric units for the construction of noncentrosymmetric materials. Herein, by self-assembling the 4,4',4''-nitrilotribenzoic acid (HNBA) with bis(cyclopentadienyl)-zirconium dichloride (CpZrCl, Cp=η-CH) in different solvent conditions, we have obtained three hierarchical packing modes of metallo-tetrahedra with distinct spatial symmetry groups (designated as Zr-α, Zr-β, and Zr-γ). Among them, Zr-α employs a simple cubic arrangement and is a common centrosymmetric superstructure, which consists of a pair of equimolar metallo-tetrahedra enantiomers in its unit cell.

View Article and Find Full Text PDF

Preparation and application of achiral UiO-66-NH MOFs for enantioselective fluorescent detection of lysine enantiomers.

Talanta

January 2025

Institute of Drug Discovery Technology, Ningbo University, Ningbo, 315211, China; Qian Xuesen Collaborative Research Center of Astrochemistry and Space Life Sciences, Ningbo University, Ningbo, 315211, China.

Lysine (Lys) is an essential nutrient that plays a crucial role in the growth and development of living organisms. Chiral analysis of Lys holds significant importance for ensuring the safety of food, pharmaceuticals, and health products. In this work, an achiral Zr-based metal organic frameworks (MOFs), UiO-66-NH, was proposed as a fluorescent probe to achieve rapid response to l-lysine (L-Lys) in solution.

View Article and Find Full Text PDF

Zirconium Hydride Catalysis Initiated by Tetrabutylammonium Fluoride.

J Org Chem

August 2024

Mirati Therapeutics, 3545 Cray Court, San Diego, California 92121, United States.

In our drug discovery campaigns to target the oncogenic drivers of cancers, the demand for a chemoselective, stereoselective and economical synthesis of chiral benzylamines drove the development of a catalytic zirconium hydride reduction. This methodology uses the inexpensive, bench stable zirconocene dichloride, and a novel tetrabutylammonium fluoride activation tactic to catalytically generate a metal hydride under ambient conditions. The diastereo- and chemoselectivity of this reaction was tested with the preparation of key intermediates from our discovery programs and in the scope of sulfinyl ketimines and carbonyls relevant to medicinal chemistry and natural product synthesis.

View Article and Find Full Text PDF

Zr-immunoPET is a hot topic as Zr cumulates the advantages of Cu and I without their drawbacks. We report the synthesis of a model ligand of a chiral bioconjugable tetrahydroxamic chelator combining the desferriferrioxamine B siderophore and 1-hydroxy-2-piperidone ((PIPO)H), a chiral cyclic hydroxamic acid derivative, and the study by NMR spectroscopy of its zirconium complex. Nuclear Overhauser effect measurements (ROESY) indicated that the complex exists in the form of two diastereomers, in 77 : 23 ratio, resulting from the combination of the central chiralities at the 3-C of the (PIPO)H component and at the Zr cation.

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!