An efficient and highly sustainable Ullmann-type homocoupling of bromo- and chloroarenes, including the more challenging electron-rich chloroarenes (e.g., 4-chloroanisole), catalyzed by in situ generated Pd colloids, is carried out in aqueous medium under relatively mild conditions (temperatures ranging from 40 to 90 C). Glucose is used as a clean and renewable reductant,while tetrabutylammonium hydroxide (TBAOH) acts as base, surfactant, and phasetransfer agent, creating a favorable environment for the catalyst. Pd nanoparticle sizes, morphology, and chemical composition are ascertained by TEMand XPS analyses.

Glucose as clean and renewable reductant in the Pd-nanoparticles-Catalyzed Reductive Homocoupling of bromo- and chloro-aryls in water

MONOPOLI A
;
CIMINALE, Francesco;COTUGNO P;CIOFFI, NICOLA;NACCI, Angelo
2010-01-01

Abstract

An efficient and highly sustainable Ullmann-type homocoupling of bromo- and chloroarenes, including the more challenging electron-rich chloroarenes (e.g., 4-chloroanisole), catalyzed by in situ generated Pd colloids, is carried out in aqueous medium under relatively mild conditions (temperatures ranging from 40 to 90 C). Glucose is used as a clean and renewable reductant,while tetrabutylammonium hydroxide (TBAOH) acts as base, surfactant, and phasetransfer agent, creating a favorable environment for the catalyst. Pd nanoparticle sizes, morphology, and chemical composition are ascertained by TEMand XPS analyses.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11586/134760
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