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Catalytic Si-C bond formation by nucleophilic substitution at silicon by benzyl anions generated over KNH2 loaded on alumina (1998)

Baba, T. ; Yuasa, H. ; Handa, H. ; [et al.]

Springer

Catalysis letters 50 (1998), S. 83-85

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ISSN: 1572-879X

Keywords: solid base ; KNH2 loaded on alumina ; Si-C bond formation ; toluene ; diethylsilane

Source: Springer Online Journal Archives 1860-2000

Topics: Chemistry and Pharmacology

Notes: Abstract The catalytic substitution at silicon occurs in the reaction of toluene and diethylsilane in the presence of KNH2 loaded on alumina, the yield of benzyldiethylsilane being 85% in 40 h at 329 K. Benzene also reacted with diethylsilane in the presence of the catalyst to afford a 7.5% yield of benzyl diethylsilane in 20 h at 329 K.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1023/A:1019006816637

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Granuloma formation activity and mycolic acid composition of mycobacterial cord factor (1997)

Baba, T. ; Natsuhara, Y. ; Kaneda, K. ; [et al.]

Springer

Cellular and molecular life sciences 53 (1997), S. 227-232

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ISSN: 1420-9071

Keywords: Key words. Trehalose 6,6′-dimycolate (TDM); cord factor; mycolic acid; granuloma formation; Mycobacterium; gas chromatography-mass spectrometry.

Source: Springer Online Journal Archives 1860-2000

Topics: Biology , Medicine

Notes: Abstract. We analyzed the mycolic acid composition of trehalose 6,6′-dimycolate (TDM) obtained from Mycobacterium, using thin layer chromatography, gas chromatography and gas chromatography-mass spectrometry. Utilizing TDM, whose structure was confirmed, granuloma formation in mice was investigated. All TDM used exhibited considerable granuloma formation activity in the lung and spleen. In particular, TDM from M. bovis showed the greatest activity and toxicity among mycobacterial TDM. We therefore discussed the relationship between the chemical structure and granuloma-forming activity of TDM, especially in relation to the structure of mycolic acid in TDM.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/PL00000595

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