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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As such, this provides a straightforward approach to control chirality in 1,3-dipolar cycloaddition reactions. Access to the text HTML. If you want to subscribe to this journal, see our rates You can purchase this item in Pay Per View: Epoxide hydrolases from yeasts and other sources: These 1,3-dipoles have been previously akcynes to be accessible in a one-pot reaction of imines, acid chlorides and organophosphorus reagents, and participate in 1,3-dipolar cycloaddition reactions.
Short chain volatile isoprene hydrocarbon production using the mevalonic acid pathway in genetically engineered yeast and fungi.
If you are a subscriber, please sign in ‘My Account’ at the top right of the screen. Country of ref document: Conjointement avec le Pr. In addition, the reaction proceeds with high diastereo- and regioselectivity.
Personal information regarding our website’s visitors, including their identity, is confidential. Polycyclic 2-pyrrolines are generated in rapid cycloaddition reactions, in a modular fashion from easily accessible starting materials: US USA1 en 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.
EP Kind code of ref document: You may thus request that alccynes data, should it be inaccurate, incomplete, unclear, outdated, not be used or stored, be corrected, clarified, updated or deleted. Catalysts for partial oxidation of hydrocarbons and method of partial oxidation of hydrocarbons.
Catalysis, Ruthenium, Diazo compounds, Carbene, Alkynes. In conjunction with Prof. All items in eScholarship McGill are protected by copyright alcjnes all rights reserved unless otherwise indicated.
Simple alkynes alycnes dienes via double diazoalkane carbene addition to the triple bond. 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. Enzymatic processes for the production of 4-substituted 3-hydroxybutyric acid derivatives and vicinal cyano, hydroxy substituted carboxylic acid esters.
You can move this window by clicking on the headline. Enantioselective reduction of carbonyl compounds by whole-cell biotransformation, combining a formate dehydrogenase and a R -specific alcohol dehydrogenase.
Different phosphites and phosphonites are tested for their ability to mediate intramolecular cycloaddition with alkenes, and optimum results are obtained with 2-catechyl PPh. A unique role in the addition of diazoalkane carbene to alkynes. X-ray crystallographic studies demonstrate the significant role of the PR3 unit on the ground state structure of these dipoles and their reactivity. Previous Article Gecom-Concoord Double catalytic addition of diazo compounds to alkynes: Title Creator Subject Faculty Date.
In addition, the results of the theoretical investigation of Chapter 2 are exploited to show how changes in the phosphorus substituents can be lea to fine tune regioselectivity of alkyne cycloadditions without modifying the substituents on the final product.
Malonyl-coenzyme A reductase in the modified 3-hydroxypropionate cycle for autotrophic carbon fixation in archaeal Metallosphaera and Sulfolobus spp. Deposit your lee Prepare your thesis Ask a librarian Feedback. Catalytic addition of diazoalkane carbene to propargylic compounds: Cloning and nucleotide sequence of fosfomycin biosynthetic genes of Streptomyces wedmorensis.
Methods of refining and producing dibasic esters and acids from natural oil feedstocks. Comparison of three enoate reductases and their potential use for biotransformations. Library homepage About open access About eScholarship Report a copyright concern.
Contact Help Who are we? Method for producing qlcynes from a hydrocarbon feed, comprising alcohol condensation. Catalytic addition of diazoalkane carbene to enynes: Kind code of ref document: Substrate specificity and enantioselectivity of 4-hydroxyacetophenone monooxygenase. Cycloaddition reactions of the above mentioned dipoles are examined lrs 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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Alkenes/Alkynes by Hatim Rhazi Filali on Prezi
Similarly, the rational on regioselectivity also allows the prediction of regioselectivity for a wide scope of alkynes. Journal page Archives Contents list. As per the Law relating to information storage and personal integrity, 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.
The University’s open access institutional repository: Access to the full text of this article requires a subscription. Direct route to alkenyl alkylidene bicyclohexane derivatives. 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.