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Tetraalkynylstannanes were found to be atom-economical nucleophilic reagents for the synthesis of α,β-acetylenic ketones. The scope and some limitations of the method are discussed. 相似文献
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The first report of the palladium-catalyzed cross coupling reaction of benzyl halides with alkynyl tributyltin reagents is described. This unprecedented coupling, which involves in a single reaction a tandem Stille-carbopalladation-Stille sequence allows the formation of three carbon-carbon bonds chemo-, regio- and stereoselectively and provides an efficient synthesis of highly substituted enynes. 相似文献
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