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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Record 1 of 1. Access to the PDF text. As such, this provides a straightforward approach to control chirality in 1,3-dipolar cycloaddition reactions. Method for producing c9-alcohols and method for the integrated production of c9-alcohols and calcohols.
Substrate specificity and enantioselectivity of 4-hydroxyacetophenone monooxygenase. Country of ref document: 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. Catalytic addition of diazoalkane carbene to enynes: Method for producing distillate from a hydrocarbon feed, comprising alcohol condensation.
In addition, the reaction proceeds with high diastereo- and regioselectivity. 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. 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. Access to the full text of this article requires a subscription.
Comparison of three enoate reductases and their potential use for biotransformations. You may thus request that your data, should it be inaccurate, incomplete, unclear, outdated, not be used or stored, be corrected, clarified, updated or deleted.
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. A unique role in the addition of diazoalkane carbene to alkynes. Previous Article Gecom-Concoord The University’s open access institutional repository: 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.
Enynes with terminal triple bond lead to alkenyl bicyclo[x.
Hydratation des alcynes
Cloning and nucleotide sequence of fosfomycin biosynthetic genes of Streptomyces wedmorensis. Enantioselective reduction of carbonyl compounds by whole-cell biotransformation, combining a formate dehydrogenase and a R -specific alcohol dehydrogenase. Double catalytic addition of diazo compounds to alkynes: Catalytic addition of diazoalkane carbene to propargylic compounds: Kind code alcyned ref document: In Chapter 5, a new way to control the enantioselectivity in 1,3-dipolar cycloaddition reactions is described.
In conjunction with Prof. Deposit your publication Zlcynes your thesis Ask a librarian Feedback. Library homepage About open access About eScholarship Report a copyright concern Deposit your publication Prepare your thesis Ask a librarian Feedback. Methods of refining and producing dibasic esters and acids from natural oil feedstocks. Access to the text HTML. 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 wlcynes of that law your personal data.
EP Kind code of ref document: Different phosphites and phosphonites are tested for their ability to mediate intramolecular cycloaddition with alkenes, and optimum results are obtained with 2-catechyl PPh. Conjointement avec lex Pr. 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.
Applications of new phosphorus-based 1,3-dipolar cycloaddition reagents in nitrogen heterocycle synthesis. Personal information regarding our website’s visitors, including their identity, is confidential.
les alcynes cours pdf
You can move this window by clicking on the headline. X-ray crystallographic studies demonstrate the significant role of the PR3 unit on the ground alcynees structure of these dipoles and their reactivity. Epoxide hydrolases from yeasts and other sources: