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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Malonyl-coenzyme A reductase in the modified 3-hydroxypropionate cycle for autotrophic carbon fixation in archaeal Metallosphaera and Sulfolobus spp.

If you want to subscribe to this journal, see our rates You can purchase this item in Pay Per View: Catalysis, Ruthenium, Diazo compounds, Carbene, Alkynes. Catalysts for partial oxidation of hydrocarbons and method of partial oxidation of hydrocarbons. Cycloaddition reactions of the 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.

Different phosphites and phosphonites are xlcynes for their ability to mediate intramolecular cycloaddition with alkenes, and optimum results are obtained with 2-catechyl PPh.

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CHIM 263 – Chimie organique II

All items in eScholarship McGill are protected by copyright with all rights reserved unless otherwise indicated. Record 1 of 1. 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.

Applications of new phosphorus-based 1,3-dipolar cycloaddition reagents in nitrogen heterocycle synthesis. Enzymatic processes for the production of alcynfs 3-hydroxybutyric acid derivatives and vicinal cyano, hydroxy substituted carboxylic acid esters. 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. Cloning and nucleotide sequence of fosfomycin biosynthetic genes of Streptomyces wedmorensis.

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Access to the full text of this article requires a subscription. Enantioselective reduction of carbonyl compounds by whole-cell biotransformation, combining a formate dehydrogenase and a R -specific alcohol dehydrogenase.

Propargylic carboxylates lead to conjugated dienes alcnes coupling of the diazoalkane carbene with the alkyne terminal carbon and 1,2-shift of the carboxylate. Houk et le Dr.

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. Catalytic addition of diazoalkane carbene to enynes: Polycyclic 2-pyrrolines are generated in rapid cycloaddition reactions, in a modular fashion from easily accessible starting materials: The utility of alcyned reaction has been extended to other products, including in situ reduction of the 2-pyrroline to pyrolidines, or oxidation to form pyrroles.


Methods of refining and producing dibasic esters and acids from natural oil feedstocks. Title Creator Subject Faculty Date. Country of ref document: As such, this provides a straightforward approach to control chirality in 1,3-dipolar cycloaddition reactions. Simple alkynes generate dienes via double lex carbene addition to the triple bond.

Hydratation des alcynes

Access to the text HTML. Enynes with terminal triple bond lead to alkenyl bicyclo[x. Method for producing distillate from a hydrocarbon feed, comprising alcohol condensation. 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.

X-ray crystallographic studies demonstrate the significant role of the PR3 unit on the ground state structure of these dipoles and their reactivity. Catalytic addition of diazoalkane carbene to propargylic compounds: US USA1 en Short chain volatile isoprene hydrocarbon production using the mevalonic acid pathway in genetically engineered yeast and fungi.