Top PDF Process for the synthesis of α, β-unsaturated esters
Process for the synthesis of α, β unsaturated esters
... In one embodiment, the process includes the steps of: exposing a mixture of a mono-ole?n-ester and Fe(CO)5 to ultraviolet radiation; and adding a coordinating ligand or oxidiZing age[r] ...
15
Synthesis, Reactions and Biological Importance of α, β-Unsaturated Carbodithioate Esters: A Review
... Interestingly, α, β-unsaturated thioesters have marked reactivity as Michael acceptors and they are proved to be excellent substrates in the synthesis of several natural products ...construct ...
8
α,β unsaturated acyl ammonium intermediates in asymmetric organocatalysis
... Enone-malonate synthesis via cross-metathesis In order to investigate the scope of the MML process with respect to the nucleophile- electrophile reactant, an optimisation of the starting material ...
239
Synthesis of Allylic Amines by Asymmetric Transfer Hydrogenation of α,β-Unsaturated N-(tert-Butylsulfinyl)imines
... ATH process is more convenient than the few procedures of selective reduction of the C=N bond of conjugated N-(tert-butylsulfinyl)imines reported so far, which employ stoichiometric amounts of aluminum or boron ...
26
Generation of Enamides and Enol esters: Application to Oxazole and α-Naphthol Synthesis
... Fig 1: Biologically important naphthol derivatives The profound usage of naphthalene derivatives particularly, naphthols stimulates the development of new and complementary methods for their synthesis. Stepwise ...
242
Aryloxide facilitated catalyst turnover in enantioselective α,β unsaturated acyl ammonium catalysis
... derivatization process. The scope of b- substituted a,b-unsaturated aryl esters amenable to the process was then ...benzyl esters gave the addition products 16–18 in good yield and with ...
7
Chemoenzymatic approach toward the synthesis of 3-O-(α/β)-glucosylated 3-hydroxy-β-lactams
... fic process conditions as ...cis-3-hydroxy- β-lactam ...the synthesis of α-glucosides considering the use of sucrose as a cheap and renewable donor substrate, and shows activity on a diverse ...
11
Multiple roles of aryloxide leaving groups in enantioselective annulations employing α,β unsaturated acyl ammonium catalysis
... the synthesis of polyuorinated heterocyclic products in high yield and ...this process should inform future work in this area and provide inspiration for new reaction ...
10
Novel β' and α'/β' sialon ceramics
... boundary diffusion proc< . although full densificatl can occur without the transformation becoming complete. 4. Methods of Producing Silicon Nitride-based Components The earliest successful attempts at fabricating solid ...
172
Isothiourea catalysed enantioselective Michael addition of N heterocyclic pronucleophiles to α,β unsaturated aryl esters
... Introduction Catalytic enantioselective Michael addition of enolate equiva- lents to a , b -unsaturated carbonyl compounds represents an efficient methodology for stereoselective C–C bond formation. 1 Within this ...
7
Green approach for the synthesis of some new α,β-unsaturated ketimines under water
... Available online: 04 February 2012. ABSTRACT. An environmentally benign and efficient synthesis of some α,β-unsaturated ketimines from new 2-hydroxychalcone and different aromatic amines under ...
7
Organocatalytic Michael addition–lactonisation of carboxylic acids using α,β unsaturated trichloromethyl ketones as α,β unsaturated ester equivalents
... of α,β-unsaturated esters and amides as Michael acceptors in such processes remains a challenge due to the decreased electrophilicity of such ...reactive α,β-unsaturated ...
12
Epoxidation of unsaturated esters
... in unsaturated fatty acids, are commercially epoxidised for use as stabilisers and plasticisers, The epoxy derivatives serve also as monomers for curing with agents like phthalic anhydride to give epoxy resins'”' ...
153
Addition of dithi(ol)anylium tetrafluoroborates to α, β-unsaturated ketones
... to α,β-unsaturated ketones in a Michael-type reaction yielding diverse substituted ketene ...the synthesis of diene dithiolanes by addition of an ynone to α-alkyl or aryl-substitued ...
8
Microwave induced novel synthesis and characterization of 3,5-diaryl-∆2-isoxazoline” from α, β-unsaturated carbonyl compounds
... the synthesis of substituted 3,5-diaryl-∆ 2 - isoxazoline (4a-k) through by the reaction of α,β-unsaturated carbonyl compounds with hydroxyl amine hydrochloride in presence of base/ basic Al 2 ...
6
STEREOSELECTIVE SYNTHESIS OF α,β-UNSATURATED δ-LACTONE CONTAINING NATURAL PRODUCTS, SYNTHESIS OF 12-MEMBERED MACROLACTONE AND ITS C12 EPIMER AND ATTEMPTED SYNTHESIS OF OKASPIRODIOL
... yield. In the present study on the first synthesis of 1, it was planned to undertake a macrocyclisation protocol for the macrolide ring construction instead of a macrolactonisation protocol. It was then planned to ...
5
Merging domino and redox chemistry: Stereoselective access to di- and trisubstituted β,γ-unsaturated acids and esters
... E-mail: fgarcia@ipna.csic.es;dtejedor@ipna.csic.es Homepage: http://www.ipna.csic.es/dept/qbb/qb/ [§] These authors have contributed equally to this work Abstract: This work shows how the coupling of a MW-assisted domino ...
13
Conjugate Addition of Indoles to α,β Unsaturated Ketones Using Bismuth (III) Bromide
... Keywords Bismuth, Bismuth Bromide, Conjugate Addition, Green Chemistry, Indoles Indoles and their derivatives are of considerable interest in medicinal chemistry due to the wide range of biological activity they exhibit. ...
6
An investigation of support effects on the Pt-catalysed selective transformation of α,β-unsaturated substrates
... 3 reaction schemes. 8,9 Consequently, a fundamental understanding of the active site and reaction network is pivotal for improving catalyst design. The definition of a catalyst is any reagent or material which increases ...
183
Hydrogenation of α,β-unsaturated aldehydes and lipids by water-soluble transition metal complex catalysts
... New complexes were synthesized according to the known [1] method of synthesis of the analogous [RuH(OAc)(mtppms) 3 ] complex. The structures of the three complexes were characterized by IR and/or 1 H- and 31 P-NMR ...
20