Carbonylative Coupling of Alkyl Zinc Reagents with Benzyl Bromides Catalyzed by a Nickel/NN
<sub>2</sub>
Pincer Ligand Complex
作者:Thomas L. Andersen、Aske S. Donslund、Karoline T. Neumann、Troels Skrydstrup
DOI:10.1002/anie.201710089
日期:2018.1.15
An efficient catalytic protocol for the three‐component assembly of benzyl bromides, carbon monoxide, and alkyl zinc reagents to give benzyl alkyl ketones is described, and represents the first nickel‐catalyzed carbonylative coupling of two sp3‐carbon fragments. The method, which relies on the application of nickelcomplexed with an NN2‐type pincer ligand and a controlled release of CO gas from a solid
Copper-catalyzed coupling of aryl iodides and tert-butyl β-keto esters: efficient access to α-aryl ketones and α-arylacetic acid tert-butyl esters
作者:Duo Zhao、Yongwen Jiang、Dawei Ma
DOI:10.1016/j.tet.2013.10.017
日期:2014.5
catalyzed coupling of aryl iodides with tert-butyl β-ketoesters proceeded smoothly at 40 °C in DMF, providing α-aryl ketones after acid-promoted deprotection and decarboxylation of tert-butyl ester group. While CuI/2-picolinic acid catalyzed coupling of aryl iodides with tert-butyl acetoacetate at 70 °C in dioxane delivered α-arylacetic acid tert-butyl esters upon spontaneous deacylation. A wide range of
CuI /反-4-羟基-1-脯氨酸催化的芳基碘化物与叔丁基β-酮酯的偶联在DMF中在40°C下顺利进行,在酸促进叔丁酯的脱保护和脱羧反应后得到α-芳基酮团体。CuI / 2-吡啶甲酸在二恶烷中于70°C催化芳基碘化物与乙酰乙酸叔丁酯偶合时,在自发脱酰作用下释放出α-芳酸叔丁酯。各种各样的官能团,例如乙酰基,甲氧基,腈,硝基,溴和氯与反应条件相容。
Formation of a Novel Acyl Anion Equivalent by the Electroreduction of Oxazolinium Salts
Electroreduction of oxazolinium salts synthesized from the corresponding carboxylic acids gave a novel acylanionequivalent (AAE). The reaction of these AAEs with electrophiles afforded the corresponding aldehydes or ketones in good yields.
Nickel/Photo‐Cocatalyzed Acyl C−H Benzylation of Aldehydes with Benzyl Chlorides
作者:Xiantang Li、Yujia Mao、Pei Fan、Chuan Wang
DOI:10.1002/ejoc.202200214
日期:2022.5.6
A nickel/TBADT-cocatalyzed acyl C−H benzylation of both aliphatic and aromatic aldehydes with pri. and sec. benzyl chlorides under mild reaction conditions was developed.