期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 131, 期 25, 页码 8762-+出版社
AMER CHEMICAL SOC
DOI: 10.1021/ja903540b
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The silicon congeners of well-known phosphonium ylides have been considered only as short-lived reactive intermediates. We successfully synthesized a remarkably stable phosphonium sila-ylide. Its X-ray structure reveals a long Si-P bond and a strongly pyramidalized silicon center, indicating a very weak P-Si TT interaction. In addition, it exhibits an alpha,beta-ambiphilic character with a nucleophilic silicon center, similar to its carbon-congener phosphonium ylides. This property of the phosphonium sila-ylide allows its use as a sila-Wittig reagent with carbonyl derivatives.
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