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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Simple alkynes generate dienes via double diazoalkane carbene addition to the triple bond. Different phosphites and phosphonites are tested for their ability to mediate intramolecular cycloaddition with alkenes, and optimum results are obtained with 2-catechyl PPh.
Title Creator Subject Faculty Date. Enzymatic processes for the production of 4-substituted 3-hydroxybutyric acid derivatives and vicinal cyano, hydroxy substituted carboxylic acid esters. Comparison of three enoate reductases and their potential use for biotransformations.
Applications of new phosphorus-based 1,3-dipolar cycloaddition reagents in nitrogen heterocycle synthesis. 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.
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Access to the PDF text. Enantioselective reduction of carbonyl compounds by whole-cell biotransformation, combining a formate dehydrogenase and a R -specific alcohol dehydrogenase.
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Malonyl-coenzyme A reductase in the modified 3-hydroxypropionate cycle for autotrophic carbon fixation in archaeal Metallosphaera and Sulfolobus spp. Method for producing distillate from a hydrocarbon feed, comprising alcohol condensation. Enynes with terminal triple bond lead to alkenyl bicyclo[x. All items in eScholarship McGill are protected by copyright with all rights reserved unless otherwise indicated.
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.
Alkenes/Alkynes by Hatim Rhazi Filali on Prezi
In Chapter 5, a new way to control the enantioselectivity in 1,3-dipolar cycloaddition reactions is described. 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. Substrate specificity and enantioselectivity lles 4-hydroxyacetophenone oes.
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You can move this window by clicking on the headline. Library homepage About open access About eScholarship Report a copyright concern. Catalytic addition of diazoalkane carbene to propargylic compounds: Direct route to alkenyl alkylidene bicyclohexane derivatives.
Kind code of ref document: US USA1 en 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 lles dipoles alcynea their reactivity. 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.
Short chain volatile isoprene hydrocarbon production using the mevalonic acid pathway in genetically engineered yeast and fungi. As such, this provides a straightforward approach to control chirality in 1,3-dipolar cycloaddition lew. Access to the full text of this article requires a subscription.