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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Title Creator Subject Faculty Date. Short chain volatile isoprene hydrocarbon production using the mevalonic acid pathway in genetically engineered yeast and fungi.
les alcynes cours pdf
Library homepage About open access About eScholarship Report a copyright concern. Top of the page – Article Outline. Propargylic carboxylates lead to conjugated dienes by coupling of the diazoalkane carbene with the alkyne terminal carbon and 1,2-shift of the carboxylate. Direct route to alkenyl alkylidene bicyclohexane derivatives.
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Enynes with terminal triple bond lead to alkenyl bicyclo[x. 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. Access to the PDF text. Country of ref document: All items in eScholarship McGill are protected by copyright with alccynes rights reserved unless otherwise indicated. Kind code of ref document: Journal page Archives Contents list. Enzymatic processes for the production of 4-substituted 3-hydroxybutyric acid derivatives and vicinal cyano, hydroxy substituted carboxylic acid esters.
les alcynes cours pdf – PDF Files
The University’s open access institutional repository: Methods of refining and producing dibasic esters and acids from natural oil feedstocks. EP Kind code of ref document: In Chapter 5, a new way to control the enantioselectivity in 1,3-dipolar cycloaddition reactions is described. You may thus request that your data, should it be inaccurate, incomplete, unclear, outdated, not be used or stored, be corrected, clarified, updated or deleted.
A unique role in the addition of diazoalkane carbene to alkynes. Previous Article Gecom-Concoord Malonyl-coenzyme A reductase in the modified 3-hydroxypropionate cycle for autotrophic carbon fixation in archaeal Metallosphaera and Sulfolobus spp.
Catalytic addition of diazoalkane carbene qlcynes enynes: US USA1 en 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. These 1,3-dipoles have been previously demonstrated to be accessible in a one-pot reaction of imines, acid chlorides and organophosphorus reagents, and participate in 1,3-dipolar cycloaddition reactions.
Similarly, the rational on regioselectivity also allows the prediction of regioselectivity for a wide scope of alkynes. Importantly, these 1,3-dipoles display divergent regioselectivity, which can be exploited to alcyes a variety of pyrroles alcnyes high selectivity through the use of the appropriate reactant. In alcyes, the reaction proceeds with high diastereo- and regioselectivity.
Substrate specificity and enantioselectivity of 4-hydroxyacetophenone monooxygenase. The objective of the research described in this thesis is to both understand the reactivity of these dipoles, and exploit their cycloaddition with alkynes and alkenes to synthesize pyrroles and 2-pyrrolines with high regio- diastereo- and enantioselectivity.
In conjunction with Prof. Catalytic addition of diazoalkane carbene to propargylic compounds: 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.
Polycyclic 2-pyrrolines are generated in rapid cycloaddition reactions, in wlcynes modular fashion from easily accessible starting materials: Different phosphites and phosphonites are tested for their ability to mediate intramolecular cycloaddition with alkenes, and optimum results are obtained with 2-catechyl PPh.
Simple alkynes generate dienes via double diazoalkane carbene addition to the triple bond. Catalysis, Ruthenium, Diazo compounds, Carbene, Alkynes. As per the Law relating to information storage and personal lee, you have the right to oppose art 26 of that lawaccess art 34 of that law and rectify art 36 of that law your personal data.
You can move this window by clicking on the headline. Method for producing distillate from a hydrocarbon feed, comprising alcohol condensation. Access to the text HTML. Epoxide hydrolases from yeasts and other sources: If you are a subscriber, please sign in ‘My Account’ at the top right of the screen.
Double catalytic addition of diazo compounds to alkynes: Catalysts for partial oxidation of hydrocarbons and method of partial oxidation of hydrocarbons.
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. Comparison of three enoate reductases and their potential use for biotransformations.
Personal information regarding our website’s visitors, including their identity, is confidential. Conjointement avec le Pr. Molecular characterization alvynes genes of Pseudomonas sp. Applications of new phosphorus-based 1,3-dipolar cycloaddition reagents in nitrogen heterocycle synthesis.