Control Factors in the Competitive Reaction of Pentacoordinate 1,2-Oxasiletanides.
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Accession number;99A0308699
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| Title;Control Factors in the Competitive Reaction of Pentacoordinate 1,2-Oxasiletanides. |
| Author;
NAGANUMA K
(Univ. Tokyo, Tokyo)
KAWASHIMA T
(Univ. Tokyo, Tokyo)
OKAZAKI R
(Univ. Tokyo, Tokyo)
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Journal Title;Abstr Symp Organomet Chem Jpn
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Journal Code:L0853A
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ISSN:
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VOL.45th;NO.;PAGE.12-13(1998)
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| Figure&Table&Reference; |
| Pub. Country;Japan |
| Language;English |
| Abstract;We have investigated the effects of substituents at the position .ALPHA. to silicon and a proton source on the reactivity of pentacoordinate 1,2-oxasiletanide. In the case of 1 bearing neopentyl group as a substituent at the 3-position, the corresponding olefin and its double-bond-shifted isomer were obtained irrespective of existence of a proton source. On the other hand, the thermolysis of 6 without neopentyl group gave olefin, (CF3)2C=CH2, as the sole product without a proton source, but in the presence of a proton source, the corresponding alcohol MeC(CF3)2OH was mainly obtained. This result clearly indicates that two reaction modes(Peterson reaction and homo-Brook rearrangement) of .BETA.-hydroxyalkylsilane with bases proceed via an identical intermediate, a pentacoordinate 1,2-oxasiletanide. (author abst.) |
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