Results 91 to 100 of about 37,404 (378)
Carbohydrate-auxiliary assisted preparation of enantiopure 1,2-oxazine derivatives and aminopolyols
Beilstein Journal of Organic Chemistry, 2012 An approach to enantiopure hydroxylated 2H-1,2-oxazine derivatives is presented utilizing the [3 + 3] cyclisation of lithiated alkoxyallenes and an L-erythrose-derived N-glycosyl nitrone as precursors.
Marcin Jasiński +2 more
doaj +1 more source
Synthesis of Spiro Pyrrolidines From the Addition of Schiff Bases to -Arylidene Cyclohexanones [PDF]
مجلة التربية والعلم, 2008 A series of -arylidene cyclohexanones (1-4) had been prepared via Claisen-Schmidt condensation, while other series of N-arylidene benzylamines (Schiff bases 5-10) had also been synthesized by equimolar addition.
A Al-Hamdany, A Mustafa, ِA Hamza
doaj +1 more source
Angewandte Chemie, EarlyView.The enantioselective epoxidation of naphthalenes into their corresponding arene oxides with aqueous hydrogen peroxide is described. The reaction combines dearomatization with installation of chemically versatile functionality in an enantioselective manner.
Najoua Choukairi Afailal +2 more
wiley +2 more sources
, 2018 Pyrrolidines are privileged substructures of numerous bioactive natural products and drugs. How to synthesize these important synthetic targets in a more efficient manner is a hot research topic. Plenty of novel strategies and methods have been developed
Jundong Li, Yilin Ye, Yandong Zhang
semanticscholar +1 more source
Alkene Oxyamination Using Malonoyl Peroxides: Preparation of Pyrrolidines and Isoxazolidines.
Journal of Organic Chemistry, 2018 Treatment of homoallylic N-tosyl amines or allylic N-tosyl hydroxylamines with 1.5 equiv of a malonoyl peroxide provides a stereoselective method to access functionalized pyrrolidines and isoxazolidines. This metal free alkene oxyamination proceeds in 50-
Carla Alamillo-Ferrer +7 more
semanticscholar +1 more source
Recent Developments in Radical Mediated Synthesis of Organostannanes.
Advanced Synthesis &Catalysis, EarlyView.Abstract The present review aims to provide an overview of the recent developments in the preparation of aryl‐ or alkenyl stannanes via carbon‐ and tin‐centered radicals enabling chemists to synthesize organostannyl derivatives with high efficiency and under mild conditions.
Qianhang Ren +4 more
wiley +1 more source
Angewandte Chemie, EarlyView.A cationic Ir(I)‐complex modified with the chiral diphosphine DM‐SEGPHOS mediates the enantioselective hydroalkylation of diverse α‐substituted styrenes with N‐aryl glycine derivatives. The products are readily advanced to β‐quaternary α‐amino acids that are inaccessible or cumbersome to access by other means. Abstract A cationic Ir(I)‐complex modified
Fenglin Hong +4 more
wiley +2 more sources
Palladium and Platinum 2,4-cis-amino Azetidine and Related Complexes [PDF]
, 2018 Seven N,N’-palladium(II) chloride complexes, one N,N’-palladium(II) acetate complex of 2,4-cis-azetidines where prepared and analyzed by single crystal XRD.
Binder +35 more
core +5 more sources
Synthesis of Spirocyclic Pyrrolidines: Advanced Building Blocks for Drug Discovery.
Chemistry, 2017 In the context of drug discovery, novel spirocyclic pyrrolidines have been synthesized in two steps from common three- to seven-membered-ring (hetero)alicyclic ketones.
B. Chalyk +5 more
semanticscholar +1 more source
Radical‐Polar Crossover Bicyclization Enables a Modular Synthesis of Saturated Bicyclic Amines
Advanced Science, EarlyView.Herein, we report the successful realization of a radical‐polar crossover bicyclization reaction from easily available cyclopropylamines and substituted alkenes through photoredox catalysis. This approach introduces an innovative methodology for the de novo synthesis of a diverse collection of 4/5‐, 5/5‐, 6/5‐,7/5‐ and 5/6‐fused saturated bicyclic ...
Dewei Feng +4 more
wiley +1 more source