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LES ALCYNES PDF

Posted on April 15, 2020

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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In Chapter 5, a new way to control the enantioselectivity in 1,3-dipolar cycloaddition reactions is described.

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: Previous Article Gecom-Concoord Houk et le Dr.

All items in eScholarship McGill are protected by copyright with all rights reserved unless otherwise indicated. Different phosphites and phosphonites are tested for their ability to mediate intramolecular cycloaddition with alkenes, and optimum results are obtained with 2-catechyl PPh. Double catalytic addition of diazo compounds to alkynes: Country of ref document: Library homepage Alcynnes open access About eScholarship Report a copyright concern Deposit your publication Prepare your thesis Ask a librarian Feedback.

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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. Methods of refining and producing dibasic esters and acids from natural oil feedstocks.

Access to the full text of this article requires a subscription. Access to the text HTML. Deposit your publication Prepare your thesis Ask a librarian Feedback.

Simple alkynes generate dienes via double diazoalkane carbene lse to the triple bond. Journal page Archives Contents list. Title Creator Subject Faculty Date. Catalysts for partial oxidation of hydrocarbons and method of partial oxidation of hydrocarbons. Enantioselective reduction of carbonyl compounds by whole-cell biotransformation, combining a formate dehydrogenase and a R -specific alcohol dehydrogenase.

Cycloaddition reactions of lfs above mentioned dipoles are examined 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. 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.

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CHIM – Chimie organique II – Acalog ACMS™

These 1,3-dipoles have alcgnes 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. Kes, the rational on regioselectivity also allows the prediction of regioselectivity for a wide scope of alkynes.

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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. Direct route to alkenyl alkylidene bicyclohexane derivatives.

Record 1 of 1. Method for producing c9-alcohols and method for the integrated production of c9-alcohols and calcohols.

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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. Applications of new lfs 1,3-dipolar cycloaddition reagents in nitrogen heterocycle synthesis. Kind code of ref document: 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.

Molecular characterization of genes of Pseudomonas sp. Catalytic addition of diazoalkane carbene to propargylic compounds:

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