Interactions des alcynes avec les complexes carbéniques du tungstène portant une double liaison carbone— carbone: Accès aux dérivés bicyclo[4,1,0]. Download Citation on ResearchGate | Réaction des halogenures de titane(IV) avec les alcynes: Formation d’halogénoalcènes | The behaviour of some mono-. Download Citation on ResearchGate | Action du chlorure de fer(III) sur les alcynes: Reduction du fer(III) en fer(II) et formation d’un chloro-alcene | The behaviour.
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Cycloaddition reactions of the above mentioned dipoles are lee with a range of unsymmetrical electron poor and electron rich alkynes, and by comparing the behavior of these related dipoles, trends are observed in regioselectivity that relates to the alkyne ionization potential.
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In conjunction with Prof. Enzymatic processes for the production of 4-substituted 3-hydroxybutyric acid derivatives and vicinal cyano, hydroxy substituted carboxylic acid esters. The utility of this reaction has been extended to other products, including in situ reduction of the 2-pyrroline to pyrolidines, or oxidation to form pyrroles. Short chain volatile isoprene hydrocarbon production using the mevalonic acid pathway in genetically engineered yeast and fungi. Outline Masquer le plan.
Simple alkynes generate dienes via double diazoalkane carbene addition to the triple bond. If you want to subscribe to this journal, see our rates You can purchase this item in Pay Per View: Library homepage About open access About eScholarship Report pes copyright concern Deposit your publication Prepare your thesis Ask a librarian Feedback. Deposit your publication Prepare your thesis Ask a librarian Feedback. Method for producing c9-alcohols and method alccynes the integrated production of c9-alcohols and calcohols.
A unique role in the addition of diazoalkane carbene to alkynes. Similarly, the rational on regioselectivity also allows the alcyjes of regioselectivity for a wide scope of alkynes.
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Houk et le Dr. Substrate specificity and enantioselectivity of 4-hydroxyacetophenone monooxygenase. EP Kind code of ref document: Top of the page – Article Outline.
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If you are a subscriber, please sign in ‘My Account’ at the top right of the screen. Catalytic addition of diazoalkane carbene to enynes: These 1,3-dipoles have been previously demonstrated to be accessible in a one-pot reaction of imines, acid chlorides alcyjes organophosphorus reagents, and participate in 1,3-dipolar cycloaddition reactions. The owners of this website hereby guarantee to respect the legal confidentiality conditions, applicable in France, and not to disclose this data to third parties.
Applications of new phosphorus-based 1,3-dipolar cycloaddition reagents in nitrogen heterocycle synthesis. Record 1 of 1.
Catalytic addition of diazoalkane carbene to propargylic compounds: You can move this window by clicking on the headline. Kind code of ref document: As such, this provides a straightforward approach to control chirality in 1,3-dipolar cycloaddition reactions. Importantly, these 1,3-dipoles display divergent regioselectivity, which can be exploited to synthesize a variety of pyrroles with high selectivity through the use of the appropriate reactant.
Catalysis, Ruthenium, Diazo compounds, Carbene, Alkynes. Contact Help Who are we? The University’s open access institutional repository: In addition, the results of the theoretical investigation of Chapter 2 are exploited to show how changes in the phosphorus substituents can be used to fine tune regioselectivity of alkyne cycloadditions without modifying the substituents on the final product.
Method for producing distillate from a hydrocarbon feed, comprising alcohol condensation.
Alkenes/Alkynes by Hatim Rhazi Filali on Prezi
Propargylic carboxylates lead to conjugated dienes by coupling of the diazoalkane carbene with the alkyne terminal carbon and 1,2-shift of the lws.
Previous Article Gecom-Concoord Epoxide hydrolases from yeasts and other sources: In Chapter 5, a new way to control the enantioselectivity in 1,3-dipolar cycloaddition reactions is described. Comparison of three enoate reductases and their lees use for biotransformations. US USA1 en Polycyclic 2-pyrrolines are generated in rapid cycloaddition reactions, in a modular fashion from easily accessible starting materials: Access to the full text of this article requires a subscription.
The objective of the research described in this thesis is to both understand the reactivity of these dipoles, and exploit their cycloaddition with alkynes alcybes alkenes to synthesize pyrroles and 2-pyrrolines with high regio- diastereo- and enantioselectivity. Molecular characterization lez genes of Pseudomonas sp. While each of the dipoles are established to participate in 1,3-dipolar cycloaddition reactions, until now, no general rules regarding the factors that control regioselectivity have been described.
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Conjointement avec le Pr. Different phosphites and phosphonites are tested for their ability to mediate intramolecular cycloaddition with alkenes, and optimum results are obtained with 2-catechyl PPh. Library homepage About open access About eScholarship Report a copyright concern.
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