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Titolo:
Carbon-carbon bond formation by means of organotellurium compounds
Autore:
Barrientos-Astigarraga, RE; Castelani, P; Comasseto, JV; Formiga, HB; da Silva, NC; Sumida, CY; Vieira, ML;
Indirizzi:
Univ Sao Paulo, Inst Quim, BR-05599970 Sao Paulo, Brazil Univ Sao Paulo Sao Paulo Brazil BR-05599970 BC05599970 Sao Paulo, Brazil
Titolo Testata:
JOURNAL OF ORGANOMETALLIC CHEMISTRY
fascicolo: 1-2, volume: 623, anno: 2001,
pagine: 43 - 47
SICI:
0022-328X(20010330)623:1-2<43:CBFBMO>2.0.ZU;2-P
Fonte:
ISI
Lingua:
ENG
Soggetto:
LITHIUM-TELLURIUM EXCHANGE; CROSS-COUPLING REACTIONS; Z-VINYLIC TELLURIDES; PREPARATIVE METHOD; ORGANIC-SYNTHESIS; Z-ENYNES; REAGENTS; ENONES; TRANSMETALATION; ENEDIYNES;
Keywords:
organotellurium compounds; transmetallation; coupling reactions;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
32
Recensione:
Indirizzi per estratti:
Indirizzo: Comasseto, JV Univ Sao Paulo, Inst Quim, Av Prof Lineu Prestes 748,Cxp 26077, BR-05599970 Sao Paulo, Brazil Univ Sao Paulo Av Prof Lineu Prestes 748,Cxp 26077 Sao Paulo Brazil BR-05599970 BC
Citazione:
R.E. Barrientos-Astigarraga et al., "Carbon-carbon bond formation by means of organotellurium compounds", J ORGMET CH, 623(1-2), 2001, pp. 43-47

Abstract

Z vinylic tellurides are prepared by hydrotelluration of alkynes under nonreducing conditions using n-BuLi-Te-H2O as the hydrotellurating system. Thesame system promotes the hydrotelluration of alkenes containing electron withdrawing groups. Lithium and magnesium organotellurolates effect vinylic substitutions on vinylic halides, phosphates, sulphonates and acetates leading to the Z vinylic telluride exclusively. Tellurides are transmetallated with easily available organometallic reagents to give valuable synthetic building blocks (e.g. organolithiums and organocuprates). Reaction of vinylictellurides with alkynes under Pd catalysis or with organocuprates gives the coupling products with retention of the double bond geometry. (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 03/12/20 alle ore 12:16:36