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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Double catalytic addition of diazo compounds to alkynes: Top of the page – Article Outline. Substrate specificity and lez of 4-hydroxyacetophenone monooxygenase. Catalysts for partial oxidation of hydrocarbons and method of partial oxidation of hydrocarbons.
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A unique role in the addition of diazoalkane carbene to alkynes. You may thus request that your data, should it be inaccurate, incomplete, unclear, outdated, not be used or stored, be corrected, clarified, updated or deleted.
Alkenes/Alkynes by Hatim Rhazi Filali on Prezi
Methods of refining and producing dibasic esters and acids from natural oil feedstocks. 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.
Enzymatic processes for the production of 4-substituted 3-hydroxybutyric acid derivatives and vicinal cyano, hydroxy substituted carboxylic acid esters. Method for producing distillate from a hydrocarbon feed, comprising alcohol condensation. Cloning and nucleotide sequence of fosfomycin biosynthetic genes of Streptomyces wedmorensis. Kind code of ref document: Simple alkynes generate dienes via double diazoalkane carbene addition to the triple bond.
In addition, the reaction proceeds with high diastereo- and regioselectivity. 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. In Chapter 5, a new way to control the enantioselectivity in 1,3-dipolar cycloaddition reactions is described. Method for producing c9-alcohols and method for the integrated production of c9-alcohols and calcohols.
Propargylic carboxylates lead to conjugated dienes by coupling of the diazoalkane carbene with the alkyne terminal carbon and 1,2-shift of the carboxylate. Similarly, the rational on regioselectivity also allows the prediction of regioselectivity for a wide scope of alkynes.
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. The University’s open access institutional repository: Record 1 of 1.
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Journal page Xlcynes Contents list. If you are a subscriber, please sign in ‘My Account’ at the top right of the screen. 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.
Country of ref document: In conjunction with Prof. Comparison of three enoate reductases and their potential use for biotransformations. Conjointement avec le Pr. Library homepage About open access About eScholarship Report a copyright concern.
Catalytic addition of diazoalkane carbene to propargylic compounds: X-ray crystallographic studies demonstrate the significant role of the PR3 unit on the ground state structure of these dipoles and their reactivity. 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. Houk et le Dr. Title Creator Subject Faculty Date.
Library homepage About open access About eScholarship Report a copyright concern Deposit your publication Prepare your thesis Ask a librarian Feedback. Deposit your publication Prepare your thesis Ask a librarian Feedback. Catalysis, Ruthenium, Diazo compounds, Carbene, Alkynes.
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. 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.
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.
Enynes with terminal triple bond lead to alkenyl bicyclo[x. Epoxide hydrolases from yeasts and other sources: Malonyl-coenzyme A reductase in the modified 3-hydroxypropionate cycle for autotrophic carbon fixation in archaeal Metallosphaera and Sulfolobus spp. EP Kind code of ref document: Personal information regarding our website’s visitors, including their identity, is confidential.
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CHIM – Chimie organique II – Acalog ACMS™
Short chain volatile isoprene hydrocarbon production using the mevalonic acid pathway in genetically engineered yeast and fungi.
Direct route to alkenyl alkylidene bicyclohexane derivatives. Applications of new phosphorus-based 1,3-dipolar cycloaddition reagents in nitrogen heterocycle synthesis. Enantioselective reduction of carbonyl compounds by whole-cell biotransformation, combining a formate dehydrogenase and a R -specific alcohol dehydrogenase.