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Titolo:
Synthesis of perfluoroalkylated bipyridines - New ligands for oxidation reactions under fluorous triphasic conditions
Autore:
Quici, S; Cavazzini, M; Ceragioli, S; Montanari, F; Pozzi, G;
Indirizzi:
CNR, Ctr Sintesi & Stereochim Speciali Sistemi Organ, I-20133 Milan, ItalyCNR Milan Italy I-20133 him Speciali Sistemi Organ, I-20133 Milan, Italy Univ Milan, Dipartimento Chim Organ & Ind, I-20133 Milan, Italy Univ Milan Milan Italy I-20133 to Chim Organ & Ind, I-20133 Milan, Italy
Titolo Testata:
TETRAHEDRON LETTERS
fascicolo: 18, volume: 40, anno: 1999,
pagine: 3647 - 3650
SICI:
0040-4039(19990430)40:18<3647:SOPB-N>2.0.ZU;2-N
Fonte:
ISI
Lingua:
ENG
Soggetto:
PERFLUORINATED SOLVENTS; AEROBIC EPOXIDATION; BIPHASIC CONDITIONS; COMPLEXES; CATALYSTS; ALKENES; OLEFINS; RUTHENIUM; ALKANES; CO;
Keywords:
catalysis; nitrogen heterocycles; perfluoroalkyl compounds; ruthenium and compounds;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Physical, Chemical & Earth Sciences
Citazioni:
23
Recensione:
Indirizzi per estratti:
Indirizzo: Quici, S CNR, Ctr Sintesi & Stereochim Speciali Sistemi Organ, Via Golgi 19, I-20133 CNR Via Golgi 19 Milan Italy I-20133 rgan, Via Golgi 19, I-20133
Citazione:
S. Quici et al., "Synthesis of perfluoroalkylated bipyridines - New ligands for oxidation reactions under fluorous triphasic conditions", TETRAHEDR L, 40(18), 1999, pp. 3647-3650

Abstract

Fluorous soluble bipyridines bearing two perfluoroalkylated side chains inthe 6,6'- or 4,4'-positions have been prepared in good yields via etherification of 6,6'-bis(chloromethyl)-2,2'-bipyridine or C-alkylation of 6,6'-dimethyl-2,2'-bipyridine. The new ligands L exhibit amphiphilic behaviour with respect to certain fluorous-organic biphasic systems. Nevertheless, theirruthenium complexes (RuLn)X generated in situ are efficient catalysts for the epoxidation of trans-stilbene in a fluorous triphasic system CH2Cl2/H2O/C8F18 in the presence of NaIO4. The fluorous phase, where (RuLn)X is trapped, can be used up to four times without major loss of catalytic activity. (C) 1999 Elsevier Science Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 27/09/20 alle ore 06:26:23