Copper-Catalyzed and Indium-Mediated Methoxycarbonylation of Unactivated Alkyl Iodides with Balloon CO
作者:Yanchi Chen、Lei Su、Hegui Gong
DOI:10.1021/acs.orglett.9b01573
日期:2019.6.21
This work emphasizes the synthesis of alkyl esters via Cu-catalyzed and In-mediated alkoxycarbonylation of unactivatedalkyliodides in the presence of In or InI. The reactions were suitable for the preparation of primary, secondary, and even tertiary alkyl esters, representing an exceptionally rare example for the creation of quaternary carbon centers upon formation of esters. The preliminary mechanistic
这项工作强调在In或InI的存在下,通过Cu催化和In介导的未活化烷基碘的烷氧基羰基化来合成烷基酯。该反应适合于伯,仲,甚至叔烷基酯的制备,代表了在形成酯时生成季碳中心的极为罕见的例子。初步的机理研究表明,涉及烷基自由基,而Cu / In / CO在羰基化事件中起着协同作用。
Microwave accelerated selective and facile deprotection of allyl esters catalyzed by Montmorillonite K-10
作者:Anil S. Gajare、Nadim S. Shaikh、Bhushan K. Bonde、Vishnu H. Deshpande
DOI:10.1039/a909265j
日期:——
Carboxylic acids are regenerated from their corresponding substituted allyl esters by Montmorillonite K-10 using microwave irradiation under solvent free conditions to afford enhanced yields and reduced reaction times compared to thermal conditions.
The mechanism of the monoelectronic reduction of aromatic esters has been investigated. The unexpected synthetic utility of the toluate moiety in the deoxygenation of alcohols and the allylation of ketones is also reported. Finally, the use of aromatic esters as robust, though easily removable, protecting groups is depicted. (C) 2009 Elsevier Ltd. All rights reserved.
Facile Deprotection of Aromatic <i>tert</i>‐Butyl and Allylic Esters Under Microwave Irradiation Conditions
作者:Jong Chan Lee、Eun Sang Yoo、Jin Seo Lee
DOI:10.1081/scc-200026661
日期:2004.1.1
A simple and efficient method for the deprotection of tert-butyl and allylic esters is described, which occurs under microwave irradiation with p-toluenesulfonic acid in solvent-free conditions.
Metal-free acceptorless dehydrogenative cross-coupling of aldehydes/alcohols with alcohols
reactions have achieved great success for accessing carbon–carbon and carbon–heteroatom bonds during the past decade, metal-free acceptorless dehydrogenative cross coupling is still scarce and highly desirable. Herein we report a robust metal-free acceptorless dehydrogenative cross-coupling for both carbon–heteroatom and carbon–carbonbondformation. By synergistic catalysis of the organophotocatalyst