Catalyst-Free Dehydrative α-Alkylation of Ketones with Alcohols: Green and Selective Autocatalyzed Synthesis of Alcohols and Ketones
作者:Qing Xu、Jianhui Chen、Haiwen Tian、Xueqin Yuan、Shuangyan Li、Chongkuan Zhou、Jianping Liu
DOI:10.1002/anie.201308642
日期:2014.1.3
Direct dehydrative α‐alkylation reactions of ketones with alcohols are now realized under simple, practical, and green conditions without using external catalysts. These catalyst‐free autocatalyzed alkylation methods can efficiently afford useful alkylated ketone or alcohol products in a one‐pot manner and on a large scale by CC bond formation of the in situ generated intermediates with subsequent
Ligated Regioselective PdII Catalysis to Access β-Aryl-Bearing Aldehydes, Ketones, and β-Keto Esters
作者:Mari Vellakkaran、Murugaiah M. S. Andappan、Nagaiah Kommu
DOI:10.1002/ejoc.201200770
日期:2012.9
arylative isomerization of allyl alcohols, a milder and regioselectiveaccess to the versatile building blocks β-aryl aldehydes and ketones was developed. This new and chelation-controlled protocol enabled the compatibility of wide range of functionalities to generate dihydrochalcones, α-benzyl-α′-alkyl acetones, dihydrocinnamaldehydes, and α-benzyl β-keto esters (from Baylis–Hillman adducts). A practical
Utility of Organoboron Reagents in Arylation of Cyclopropanols via Chelated Pd(II) Catalysis: Chemoselective Access to β-Aryl Ketones
作者:Thangeswaran Ramar、Murugaiah A. M. Subbaiah、Andivelu Ilangovan
DOI:10.1021/acs.joc.0c00160
日期:2020.6.19
Organoborane reagents were investigated as coupling partners to cyclopropanol-derived β-ketone enolates in the presence of a chelated Pd(II) catalyst. Efficient coupling of a range of electronically and sterically diverse cyclopropanols and aryl/alkenyl boronic derivatives (39 examples, 65–94% yield) could be achieved with the generation of synthetically important β-aryl ketone intermediates in a chemoselective