Pd-Catalyzed β-C(sp<sup>3</sup>
)−H Arylation of Propionic Acid and Related Aliphatic Acids
作者:Kiron K. Ghosh、Manuel van Gemmeren
DOI:10.1002/chem.201705449
日期:2017.12.14
A generally applicable Pd‐catalyzed protocol for the β‐C(sp3)−H arylation of propionic acid and related α‐branched aliphatic acids is reported. Enabled by the use of N‐acetyl‐β‐alanine as ligand our protocol delivers a broad range of arylation products. Notably, the highly challenging substrate, propionic acid, which lacks any acceleration through the Thorpe–Ingold effect, can be employed as substrate
Direct synthesis of 3-arylpropionic acids by tetraphosphine/palladium catalysed Heck reactions of aryl halides with acrolein ethylene acetal
作者:Mhamed Lemhadri、Henri Doucet、Maurice Santelli
DOI:10.1016/j.tet.2004.09.061
日期:2004.12
4-tetrakis(diphenylphosphinomethyl)cyclopentane as a catalyst, a range of aryl bromides undergoes Heck reaction with acrolein ethylene acetal. With this acetal, the selective formation of 3-arylpropionic acids/esters was observed. The functional group tolerance on the aryl halide is remarkable; substituents such as fluoro, methyl, methoxy, acetyl, formyl, benzoyl, nitro or nitrile are tolerated. Furthermore
[EN] AEROBIC OXIDATION SYSTEM CONTAINING SULFINIC ACID, SULFONIC ACID OR DERIVATIVES THEREOF AND PHOTOCATALYTIC OXIDATION METHOD THEREFOR<br/>[FR] SYSTÈME D'OXYDATION AÉROBIE CONTENANT DE L'ACIDE SULFINIQUE, DE L'ACIDE SULFONIQUE OU DES DÉRIVÉS ASSOCIÉS ET PROCÉDÉ D'OXYDATION PHOTOCATALYTIQUE CORRESPONDANT<br/>[ZH] 一种含亚磺酸、磺酸或其衍生物的需氧氧化体系及其光促氧化方法