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Titolo:
BORON-COMPOUNDS .114. TRIMETHYLSILYLATED 1,4-DIBORINANES AND 1,3-DIBOROLANES FORMATION, ISOMER SEPARATION, AND CHARACTERIZATION
Autore:
KOSTER R; SEIDEL G; LUTZ F; KRUGER C; KEHR G; WRACKMEYER B;
Indirizzi:
MAX PLANCK INST KOHLENFORSCH,KAISER WILHELM PL 1 D-45466 MULHEIM GERMANY UNIV BAYREUTH,ANORGAN CHEM LAB D-95447 BAYREUTH GERMANY
Titolo Testata:
Chemische Berichte
fascicolo: 5, volume: 127, anno: 1994,
pagine: 813 - 820
SICI:
0009-2940(1994)127:5<813:B.T1A1>2.0.ZU;2-7
Fonte:
ISI
Lingua:
GER
Soggetto:
STEREOSELECTIVE SYNTHESIS; REDUCTIVE ALKYLATION; HYDROBORATION; SILYLACETYLENES; ALKYNYLSILANES; DIALKYLBORANES; VINYLSILANES; REACTIVITY; OXIDATION; ACETYLENE;
Keywords:
HYDROBORATION OF 1-ALKINYLSILANES; ETHYLDIBORANES(6); ALKYL SUBSTITUENT EXCHANGES, BH-BORANE-CATALYZED; 1,4-DIBORINANES, TRIMETHYLSILYL-SUBSTITUTED, ISOMERS OF; LEWISBASE-1,4-DIBORINANES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
55
Recensione:
Indirizzi per estratti:
Citazione:
R. Koster et al., "BORON-COMPOUNDS .114. TRIMETHYLSILYLATED 1,4-DIBORINANES AND 1,3-DIBOROLANES FORMATION, ISOMER SEPARATION, AND CHARACTERIZATION", Chemische Berichte, 127(5), 1994, pp. 813-820

Abstract

Me3SiC=CH (A) reacts with excess (Et2BH)2 via the compounds 1, 1' and2, 2' to yield a mixture of four regio- and stereoisomeric diethyl-2,5(6)-bis(trimethylsilyl)-1,4-diborinanes (3a-d) and minor amounts of ethyl-trans-2,5-bis(trimethylsilyl)-1,3-diborolane (4a). The 2,5-ee-(Me3Si)2 compound 3d is isolated as the adduct 3d(Pic)2 (X-ray structure analysis), from which pure 3d is obtained with Et2O-BF3. 3d and Me3P form equilibria of the 1:1 and 1:2 addition compounds 3d(Me3P)n (n = 1,2) at room temperature. Me3SiC=CMe (B) reacts with (Et2BH)2 via 5 to give 6-10, and Me3SiC=CSiMe3 (C) reacts with (Et2BH)2 to form the ring compounds 12 and 13 via the presumably threo/erythro mixture of 11a and b.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 28/09/20 alle ore 15:21:13