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Titolo:
Multigram scale cobalt catalyzed photochemical methoxycarbonylation of alkenes
Autore:
Dragojlovic, V; Bin Gao, D; Chow, YL;
Indirizzi:
Simon Fraser Univ, Dept Chem, Burnaby, BC V5A 1S6, Canada Simon Fraser Univ Burnaby BC Canada V5A 1S6 , Burnaby, BC V5A 1S6, Canada
Titolo Testata:
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
fascicolo: 1-2, volume: 171, anno: 2001,
pagine: 43 - 51
SICI:
1381-1169(20010612)171:1-2<43:MSCCPM>2.0.ZU;2-V
Fonte:
ISI
Lingua:
ENG
Soggetto:
PHASE-TRANSFER CATALYSIS; AMBIENT CONDITIONS; VINYL HALIDES; ALKYL IODIDES; OLEFINS; HYDROFORMYLATION; CARBONYLATION; PRESSURE; ARYL;
Keywords:
photochemical carbonylation; alkenes; carbon monoxide; cobalt; beta-pinene;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
38
Recensione:
Indirizzi per estratti:
Indirizzo: Dragojlovic, V Nova SE Univ, Dept Oceanog, 8000 N Ocean Dr, Dania, FL 33004 USA Nova SE Univ 8000 N Ocean Dr Dania FL USA 33004 L 33004 USA
Citazione:
V. Dragojlovic et al., "Multigram scale cobalt catalyzed photochemical methoxycarbonylation of alkenes", J MOL CAT A, 171(1-2), 2001, pp. 43-51

Abstract

Photocarbonylation of alkenes was successfully carried out on a multigram scale (5-10 g) on a number of alkenes. Optimum conditions (temperature, solvent, concentration, UV source and filters) were established; it was shown that the rate of reaction depends on the concentration of the cobalt catalyst. The cobalt catalyst was stable only under a narrow range of conditions and any deviation from them either reduced the rate of photocarbonylation, or caused the cobalt to precipitate and stop the reaction. It was shown that the rate and selectivity of photocarbonylation reaction depend on a degree of substitution of alkenes. Mono and disubstituted alkenes gave the corresponding methyl esters in good yields (69-85%), while trisubstituted alkenes either did not react at all, or gave complex mixtures of products. Selectivity can be achieved in carbonylation of dienes if conversion is kept low. (C) 2001 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 22/09/18 alle ore 02:15:09