A General Approach to Intermolecular Olefin Hydroacylation through Light‐Induced HAT Initiation: An Efficient Synthesis of Long‐Chain Aliphatic Ketones and Functionalized Fatty Acids
作者:Subhasis Paul、Joyram Guin
DOI:10.1002/chem.202004946
日期:2021.3
hydroacylation protocol applies to a wide array of substrates bearing numerous functional groups and many complex structural units. The reaction proves to be scalable (up to 5 g). Different functionalized fattyacids, petrochemicals and naturally occurring alkanes can be synthesized with this protocol. A radical chain mechanism is implicated in the process.
Direct Aldehyde Csp<sup>2</sup>
−H Functionalization through Visible-Light-Mediated Photoredox Catalysis
作者:Minh Duy Vu、Mrinmoy Das、Xue-Wei Liu
DOI:10.1002/chem.201704224
日期:2017.11.13
challenge for synthetic chemists. In recent years there has been considerable interest in using selective C−Hactivation as a direct route for generating reactive intermediates. Herein, the use of visible‐light‐mediated dual photoredox organocatalysis as a mild and effective method for C −H activation of aldehydes is reported, resulting in the generation of acyl radicals. These nucleophilic acyl radical
A three‐component coupling between alkanes, CO, and electron‐deficient alkenes in the presence of a catalytic amount of (nBu4N)4W10O32 (TBADT) has resulted in the efficient formation of unsymmetrical ketones. This process is based on the carbonylation of alkyl radicals photocatalytically generated by CH activation of alkanes and the subsequent addition to alkenes (see scheme; EWG=electron‐withdrawing
在催化量为(n Bu 4 N)4 W 10 O 32(TBADT)的存在下,烷烃,CO和缺电子烯烃之间的三组分偶联导致有效形成不对称酮。此过程基于烷烃的CH活化光催化产生的烷基的羰基化反应,随后将其添加到烯烃中(请参见方案; EWG =吸电子基团)。
Metal-Free CH Bond Activation of Branched Aldehydes with a Hypervalent Iodine(III) Catalyst under Visible-Light Photolysis: Successful Trapping with Electron-Deficient Olefins
作者:Shin A. Moteki、Asuka Usui、Sermadurai Selvakumar、Tiexin Zhang、Keiji Maruoka
DOI:10.1002/anie.201406513
日期:2014.10.6
of a hypervalentiodine(III) catalystunder visible light photolysis allows a mild way of generating acyl radicals from various branchedaldehydes, thereby giving the corresponding hydroacylated products almost exclusively. Another characteristic feature of this approach is the catalytic use of hypervalentiodine(III) reagent, which is a rare example on the generation of radicals in hypervalent iodine