Decarboxylative Allylation of Amino Alkanoic Acids and Esters via Dual Catalysis
作者:Simon B. Lang、Kathryn M. O’Nele、Jon A. Tunge
DOI:10.1021/ja508317j
日期:2014.10.1
temperature decarboxylative allylation of recalcitrant α-amino and phenylacetic allyl esters. This operationally simple process produces CO2 as the only byproduct and provides direct access to allylated alkanes. After photochemical oxidation, the carboxylate undergoes radical decarboxylation to site-specifically generate radical intermediates which undergo allylation. A radical dual catalysis mechanism
光氧化还原和钯催化的组合已被用于促进顽固的 α-氨基和苯乙酸烯丙酯的室温脱羧烯丙基化。这个操作简单的过程产生 CO2 作为唯一的副产品,并提供直接获取烯丙基化烷烃的途径。光化学氧化后,羧酸盐发生自由基脱羧作用,以位点特异性地生成自由基中间体,然后进行烯丙基化。提出了一种自由基双催化机制。游离苯乙酸也使用类似的反应条件进行烯丙基化。
Visible light-induced intermolecular radical addition: facile access to γ-ketoesters from alkyl-bromocarboxylates and enamines
A highly efficient addition of alkyl α-bromocarboxylates to enamines by visible light-induced photoredox catalysis is reported.
报道了一种通过可见光诱导的光氧化还原催化剂高效加成烯胺的烷基α-溴羧酸酯。
Radical cyclization of allyl α-bromocarboxylates into λ-butyrolactones. Effect of the ester structure on the cyclization
作者:A. B. Terent'ev、T. T. Vasil'eva、N. A. Kuz'mina、N. S. Ikonnikov、S. A. Orlova、E. I. Mysov、Yu. N. Belokon'
DOI:10.1007/bf02495259
日期:1997.12
Allyl dibromoacetate, allyl α-bromopropionate, and allyl phenylbromoacetate undergo cyclization in benzene in the presence of increased concentration of Fe(CO)5—DMF as the initiating system to give the corresponding bromo-substituted butyrolactones.