Results 81 to 90 of about 12,893 (216)

Mechanistic Insights into Electrooxidative Allylation of a Carbamate in the Presence of Solid-Supported Acids

Electrochemistry
The electrooxidative allylation of a carbamate was successfully demonstrated using 3-propylsulfonic acid-functionalized silica gel (Si-SCX-2). It was shown that the electrochemical oxidation of the carbamate as a first step yields the corresponding N ...
Haruka HOMMA, Natsumi HONJO, Akihiro TAKABAYASHI, Toshiki TAJIMA   +3 more
doaj   +1 more source

Synthesis of a tricyclic lactam via Beckmann rearrangement and ring-rearrangement metathesis as key steps

Beilstein Journal of Organic Chemistry, 2015
A tricyclic lactam is reported in a four step synthesis sequence via Beckmann rearrangement and ring-rearrangement metathesis as key steps. Here, we used a simple starting material such as dicyclopentadiene.
Sambasivarao Kotha, Ongolu Ravikumar, Jadab Majhi   +2 more
doaj   +1 more source

Palladium and Organocatalysis: An Excellent Recipe for Asymmetric Synthesis

Molecules, 2013
The dual activation of simple substrates by the combination of organocatalysis and palladium catalysis has been successfully applied in a variety of different asymmetric transformations.
Isidro M. Pastor, Diego A. Alonso, Beatriz Maciá, M. Ángeles Fernández-Ibañez   +3 more
doaj   +1 more source

Successive Nucleophilic and Electrophilic Allylation for the Catalytic Enantioselective Synthesis of 2,4-Disubstituted Pyrrolidines

, 2019
Successive nucleophilic and electrophilic allylation mediated by the bis-Boc-carbonate derived from 2-methylene-1,3-propane diol enables formation of enantiomerically enriched 2,4-disubstituted pyrrolidines.
Michael J. Krische (1324470), Ming Xiang (1523263), Guoshun Luo (5445587), Guoshun Luo, Michael J. Krische, Ming Xiang   +5 more
core   +1 more source

Raising the Diversity of Ugi Reactions Through Selective Alkylations and Allylations of Ugi Adducts

Frontiers in Chemistry, 2019
We report here selective Tsuji-Trost type allylation of Ugi adducts using a strategy based on the enhanced nucleophilicity of amide dianions. Ugi adducts derived from aromatic aldehydes were easily allylated at their peptidyl position with allyl acetate ...
Alaa Zidan, Alaa Zidan, Abeer M. El-Naggar, Nour E. A. Abd El-Sattar, Ali Khalil Ali, Laurent El Kaïm   +5 more
doaj   +1 more source

Enantioselective Addition of Allyltin Reagents to Amino Aldehydes Catalyzed with Bis(oxazolinyl)phenylrhodium(III) Aqua Complexes

Molecules, 2011
Bis(oxazolinyl)phenylrhodium(III) aqua complexes, (Phebox)RhX2(H2O) [X = Cl, Br], were found to be efficient Lewis acid catalysts for the enantioselective addition of allyl- and methallyltributyltin reagents to amino aldehydes.
Hisao Nishiyama, Takatoshi Sakakura, Toshihide Takemoto, Kayoko Shimozono, Katsuyuki Aoki, Yukihiro Motoyama   +5 more
doaj   +1 more source

5-(tert-Butyldimethylsilyloxy)-1-(2-chloro-5,8-dimethoxyquinolin-3-yl)-3-methylenepentan-1-ol

Molbank, 2012
Novel 5-(tert-butyldimethylsilyloxy)-1-(2-chloro-5,8-dimethoxyquinolin-3-yl)-3-methylenepentan-1-ol (7) was prepared via allylation of 2-chloro-5,8-dimethoxyquinoline-3-carbaldehyde (6) with functionalized allylic iodide as tert-butyl-(3-(iodomethyl)but ...
Linda Bouarata, Dahmane Tebbani, Paul Mosset   +2 more
doaj   +1 more source

Palladium-Catalyzed Conjugate Allylation Reactions of α,β-Unsaturated N-Acylpyrroles

, 2016
Conjugate allylation reactions of α,β-unsaturated N-acylpyrroles using allylboronic ester are catalyzed by a palladium complex that is ligated by a bidentate N-heterocyclic carbene.
Elizabeth R. Jarvo (1310646), Michael B. Shaghafi (2162836), Benjamin L. Kohn (2168878)   +2 more
core   +1 more source

Synthesis of Chiral 1,3-Dienes through Ring-Closing Metathesis of Enantioenriched Enynes: Potential Precursors of Morphane Analogs

Anais da Academia Brasileira de Ciências
A simple methodology for the synthesis of enynes by indium mediated diastereoselective allylation of aromatic N-tert-butanesulfinylimines bearing alkenyl groups at ortho-position with allyl bromide has been developed.
MARÍA JESÚS GARCIA-MUÑOZ, ANA SIRVENT, FRANCISCO FOUBELO, MIGUEL YUS   +3 more
doaj   +1 more source

Chelation-Assisted Substrate-Controlled Asymmetric Lithiation-Allylboration of Chiral Carbamate 1,2,4-Butanetriol Acetonide

Molecules, 2015
The lithiation of 2-(2,2-dimethyl-1,3-dioxolan-4-yl)ethyl diisopropylcarbamate (1) is achieved freely by sec-butyllithium in diethylether with high lk-diastereoselectivity: the bicyclic chelate complexes 3a and 3b are reacted with electrophiles to form ...
Adeem Mahmood, Hamad Z. Alkhathlan, Saima Parvez, Merajuddin Khan, Sohail A. Shahzad   +4 more
doaj   +1 more source