with primary and secondary allylic alcohols. The reactions, carried out in aqueous ethanol in the presence of palladium(II) acetate as precatalyst and sodium hydrogen carbonate as base, gave the arylation products with good overall conversion. In all cases, the major products were the β-arylated carbonyl derivatives. The o-benzene-disulfonimide was recovered in high yield from all the reactions, and it
芳烃重氮邻苯二磺酰亚胺与伯和仲烯丙醇反应。在醋酸钯 (II) 作为预催化剂和碳酸氢钠作为碱的存在下,在含水乙醇中进行的反应得到了具有良好总转化率的芳基化产物。在所有情况下,主要产物都是 β-芳基化羰基衍生物。从所有反应中以高收率回收邻苯二磺酰亚胺,并将其循环用于制备其他盐。
Two efficient pathways for the synthesis of aryl ketones catalyzed by phosphorus-free palladium catalysts
作者:A. Wirwis、J. Feder-Kubis、A.M. Trzeciak
DOI:10.1016/j.mcat.2017.10.021
日期:2018.2
Allylic alcohols, 1-buten-3-ol, 1-penten-3-ol and 1-octen-3-ol, reacted with aryl iodides (iodotoluene, 4-iodotoluene, 4-iodophenol and 4-iodanisole) under Heck reaction conditions to form corresponding saturated aryl ketones in one step. The same products were obtained in a two-step tandem reaction consisted of the Heck coupling of allylic alcohols with aryl iodides, followed by hydrogenation. Reactions
Pd-catalyzed Heck arylation of allyl alcohols in tetraalkylammoniumionic liquids (ILs) can be made highly selective toward the formation of either aromatic carbonyl compounds or aromatic conjugated alcohols by carefully choosing both the IL and the base.
Intermolecular Markovnikov-Selective Hydroacylation of Olefins Catalyzed by a Cationic Ruthenium–Hydride Complex
作者:Junghwa Kim、Chae S. Yi
DOI:10.1021/acscatal.6b00856
日期:2016.5.6
The cationic Ru–H complex was found to be an effective catalyst for the intermolecularhydroacylation of aryl-substituted olefins with aldehydes to form branched ketone products. The preliminary kinetic and spectroscopic studies elucidated a ruthenium-acyl complex as the key intermediate species. The catalytic method directly afforded branched ketone products in a highly regioselective manner while