Oxidative C–H Acyloxylation of Acetone with Carboxylic Acids under Iodine Catalysis
作者:Xiao-Yu Zhou、Xia Chen
DOI:10.1055/a-1336-5720
日期:2021.5
Iodine-catalyzed oxidative C(sp3)–H acyloxylation of acetone with carboxylic acids has been developed. The method employs iodide as catalyst and sodium chlorite as oxidant. Substituted benzoic acids, naphthoic acids and heteroaromatic carboxylic acids can be used, and 2-oxopropyl carboxylates are obtained with good to excellent yields.
Abstract The 1,2-dibromoethane- and KI-mediated α-acyloxylation of ketones is reported in moderate to good yield without the use of transition metals and strong oxidants. Various acids are well tolerated with wide functional group compatibility. An 1,2-dibromoethane- and KI-catalysed reaction mechanism is proposed based on the results of control experiments.
Ruthenium Carboxylate Complexes as Efficient Catalysts for the Addition of Carboxylic Acids to Propargylic Alcohols
作者:Janine Jeschke、Christian Gäbler、Marcus Korb、Tobias Rüffer、Heinrich Lang
DOI:10.1002/ejic.201500203
日期:2015.6
Heinrich Lang at the Technische Universitat Chemnitz, Germany. The cover image shows the atom-economical and highly selective addition of carboxylic acids to propargylicalcohols to give β-oxopropyl esters. This conversion is catalyzed by ruthenium complexes, represented by the skater in our picture.
德国开姆尼茨理工大学的 Heinrich Lang 小组受邀为本期杂志封面。封面图片显示了羧酸与炔丙醇的原子经济性和高选择性加成,以得到 β-氧代丙酯。这种转化由钌配合物催化,由我们图片中的溜冰者代表。
Palladium-Catalyzed Selective Anti<i>-</i>Markovnikov Oxidation of Allylic Esters
作者:Jia Jia Dong、Martín Fañanás-Mastral、Paul L. Alsters、Wesley R. Browne、Ben L. Feringa
DOI:10.1002/anie.201301809
日期:2013.5.17
An aldol alternative: The palladium(II)‐catalyzed anti‐Markovnikov oxidation of allylicesters to aldehydes at room temperature provides a viable alternative to valuable cross aldol products. High regioselectivity towards the aldehyde product was achieved using the ester protecting group for the allylic alcohol. Rapid isomerization and the much higher rate of oxidation of the branched isomer result
KI catalyzed C–H functionalization of acetone for the synthesis of 2-oxopropyl hetero-aromatic carboxylates
作者:Xiao-Yu Zhou、Xia Chen、Hai-Long Liu
DOI:10.1080/00397911.2021.1892762
日期:——
Abstract KI catalyzed C–H functionalization of acetone with hetero-aromatic carboxylic acids has been developed. With potassium iodide as catalyst and sodium chlorite as oxidant, cascade reaction including α-H electrophilic substitution of acetone and nucleophilic substitution of iodoacetone occur smoothly. 2-Oxopropyl hetero-aromatic carboxylates are obtained with the good to excellent yields.