Results 241 to 250 of about 48,499 (273)
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2012
This chapter explores regioselectivity. Chemoselectivity means that there are two separate functional groups and that a reagent must choose between them. By contrast, regioselectivity implies that there is one functional group that can react in two different places and a reagent must choose where to react.
Jonathan Clayden +2 more
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This chapter explores regioselectivity. Chemoselectivity means that there are two separate functional groups and that a reagent must choose between them. By contrast, regioselectivity implies that there is one functional group that can react in two different places and a reagent must choose where to react.
Jonathan Clayden +2 more
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Regioselective Allylzincation of Alkenylboronate
Organic Letters, 2001[reaction: see text] Boryl substitution on an olefin activates the olefinic double bond toward addition of an organozinc reagent. Addition of an allylic zinc reagent to an alkenylboronate thus takes place smoothly to afford a variety of gem-zincio/boryl species.
M, Nakamura +3 more
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Regioselective Allylgallation of Terminal Alkynes.
ChemInform, 2005AbstractFor Abstract see ChemInform Abstract in Full Text.
Phil Ho, Lee +4 more
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Selectivity II: Regioselectivity
2022This chapter focuses on regioselectivity. When devising a synthetic route to an organic molecule, substituents and functional groups must be placed in the required positions, i.e. with the correct regiochemistry. The chapter begins by evaluating the regioselectivity of some of the most common methods for the preparation of alkenes.
Christine L. Willis, Martin Wills
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Regioselective Iron‐Catalyzed Allylic Amination
Angewandte Chemie International Edition, 2006AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
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Regioselective Hydrodebromination of Polybrominated Indoles
European Journal of Organic Chemistry, 2014AbstractThe mixture of sodium borohydride and N,N,N′,N′‐tetramethylethylenediamine in combination with a palladium catalyst is a mild and efficient system for the regioselective hydrodebromination of polybrominated indoles with both N‐donating and N‐withdrawing substituents [N‐methyl‐ and N‐(methoxycarbonyl)indoles, respectively].
CHELUCCI, Giorgio Adolfo +2 more
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Synthesis of Regioselectively Deuterated Cyclopropanes
Synthetic Communications, 1996Abstract A regioselective synthesis of deuterated aliphatic cyclopropanes has been developed to furnish labeled substrates for gas-phase ion-molecule reaction studies.
Duffault, J.M. +3 more
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Regioselective electrophilic borylation of haloarenes
Chemical Communications, 2015Haloarenes undergo direct borylation using amine : BCl3 : AlCl3 in the ratio of 1 : 1 : 2.
Alessandro Del Grosso +2 more
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Regioselective N-Functionalization of Tetraazacycloalkanes
The Journal of Organic Chemistry, 2005[reaction: see text] Bisaminal type compounds obtained by condensation of pyruvic aldehyde with the suitable open-chain tetraamine followed by cyclization with either dibromoethane or dibromopropane can be regioselectively quaternized by a wide range of alkylating agents.
Frédéric, Boschetti +5 more
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Regioselectivity-Switchable Hydroarylation of Styrenes
Journal of the American Chemical Society, 2010Cobalt-phosphine and cobalt-carbene catalysts have been developed for the hydroarylation of styrenes via chelation-assisted C-H bond activation, to afford branched and linear addition products, respectively, in a highly regioselective fashion. Deuterium-labeling experiments suggested a mechanism involving reversible C-H bond cleavage and olefin ...
Ke, Gao, Naohiko, Yoshikai
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