2002年2月
Synthesis of 2-pyranylidene or (2-furyl)carbene-chromium complexes from conjugated enyne carbonyl compounds with Cr(CO)(5)(THF)
JOURNAL OF ORGANOMETALLIC CHEMISTRY
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- 巻
- 645
- 号
- 1-2
- 開始ページ
- 228
- 終了ページ
- 234
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1016/S0022-328X(01)01328-6
- 出版者・発行元
- ELSEVIER SCIENCE SA
The reaction of beta-ethynyl alpha,beta-unsaturated esters or amides with Cr(CO)(5)(L) (L = Et2O, THF), derived from chromium hexacarbonyl. gives 2-pyranylidene-chromium complexes in good yields. The conjugated ene-carbonyl-vinylidene complex is a key intermediate to these Fischer-type oxacarbene complexes. In contrast, beta-ethynyl alpha,beta-unsaturated ketones react with Cr(CO)(5)(THF) to give (2-furyl)carbene complexes via nucleophilic attack of the carbonyl oxygen atom to the intermediate n-alkyne-chromium complexes, Some chemical transformation, such as [4 + 2] type cyclization of 2-pyranylidene complexes with alkynes and aldehyde formation from (2-furyl)carbene complexes, has also been described. (C) 2002 Elsevier Science B.V. All rights reserved.
- リンク情報
- ID情報
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- DOI : 10.1016/S0022-328X(01)01328-6
- ISSN : 0022-328X
- Web of Science ID : WOS:000174467200030