Opposite Chemoselectivity (Hydrogenation versus Carbonylation) Shown by 4-Vinylpyridine with Respect to 3-Vinylpyridine under Hydroformylation Conditions with Rh4(CO)12

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• 作者：Roberta Settambolo ; Simone Scamuzzi ; Aldo Caiazzo ; and Raffaello Lazzaroni
• 刊名：Organometallics
• 出版年：1998
• 出版时间：May 11, 1998
• 年：1998
• 卷：17
• 期：10
• 页码：2127 - 2130
• 全文大小：102K
• 年卷期：v.17,no.10(May 11, 1998)
• ISSN：1520-6041

文摘

In the Rh₄(CO)₁₂-catalyzedhydroformylationof the vinylpyridine isomers, a very different chemoselectivity between 3- and 4-vinylpyridine is observed:whereas the former is fully transformed into the corresponding branched aldehyde, the latter only undergoeshydrogenation to 4-ethylpyridine. A differentbehaviorof the corresponding branched alkylmetal intermediatesrelated to the different polarization of the Rh-C bondhas been suggested to explain the above results.