Carbo-Carboxylation of Alkenes via Intramolecular Heck Carbonylation Utilizing CO<sub>2</sub> and Hydrosilane
作者:Meng-Meng Wang、Sheng-Mei Lu、Can Li
DOI:10.1021/acscatal.2c03478
日期:2022.9.2
carbo-carboxylation of alkenes has been achieved using an easily accessible Pd/monophosphine ligand combination as the catalyst. This protocol provides competent access to construct a series of 2,3-dihydrobenzofurans, chromans, isochroman, indanes and tetralins bearing a β-acid moiety in moderate to excellent yield. Additionally, the example of domino carbo-carbonylation reactions has been demonstrated
从由 CO 2和 PMHS(聚甲基氢硅氧烷)原位形成的多种烯烃束缚芳基卤化物和甲酸甲硅烷酯开始,使用易于获得的 Pd/单膦配体组合作为催化剂实现烯烃的碳羧化。该协议提供了构建一系列 2,3-二氢苯并呋喃、色满、异色满、茚满和四氢萘的能力,这些产品具有中等至极好的产量。此外,多米诺碳羰基化反应的例子已被证明使用二烯束缚芳基碘化物作为起始材料,以良好的收率形成含氧双环产物。推测烯烃的碳羧化反应通过碳甲硅烷氧基羰基化途径进行。
Palladium catalysed tandem cyclisation-anion capture processes. Part 3. Organoboron anion transfer agents
作者:Ronald Grigg、JoséM. Sansano、Vijayaratnam Santhakumar、Visuvanathar Sridharan、Ravishanker Thangavelanthum、Mark Thornton-Pett、David Wilson
DOI:10.1016/s0040-4020(97)00754-0
日期:1997.8
The cyclisation-anion capture protocol has been applied to a wide range of starter and terminating species to effect regio-and stereo-specific mono-and bis-cyclisation processes in which a variety of organoboronderivatives function as anion transfer reagents. Direct capture (no cyclisation) is rarely a problem and it can usually be suppressed by modification of the reaction conditions. (C) 1997 Elsevier Science Ltd.