A variety of aromatichydrocarbons bearing multiple alkyl substituents are accessible with perfect regiocontrol in a one-pot reaction starting from cyclohexenones and their aromatic analogues [Eq. (1)]. The present methodology can be further extended to the synthesis of polycyclic aromatichydrocarbons. The drawbacks encountered in the Friedel-Crafts reaction are resolved since the reaction proceeds
Syntheses of All Isomers of Naphthalenetricarboxylic Acids
作者:Yasuhiko Dozen
DOI:10.1246/bcsj.45.519
日期:1972.2
isomers of naphthalenetricarboxylic acids have been synthesized by the oxidation of trimethylnaphthalenes, dimethylacetonaphthones, dimethylnaphthoic acids, methylnaphthalenedicarboxylic acids, β-(dimethylnaphthoyl)propionicacid, or β-(acenaphthoyl)propionicacids with aqueous sodium bichromate or potassium ferricyanide. Most of these naphthalenetricarboxylic acids, acid anhydrides, and trimethyl esters
Carboxylic Acid-Directed Manganese(I)-Catalyzed Regioselective Hydroarylation of Unactivated Alkenes
作者:Jingqiang Han、Huimin Yu、Weiwei Zi
DOI:10.1021/acs.orglett.2c02309
日期:2022.8.26
acid-directed regioselective hydroarylation reaction of unactivated alkenes with aryl boronic acids was reported. This transformation was enabled by homogeneous manganese catalyst MnBr(CO)5 in the presence of KOH and H2O in the m-xylene reaction medium. Both internal and terminal alkenes worked well in this transformation, and a series of functional groups were tolerated. This reaction not only provided an expeditious
报道了未活化烯烃与芳基硼酸的羧酸定向区域选择性加氢芳基化反应。在间二甲苯反应介质中存在 KOH 和 H 2 O的情况下,通过均相锰催化剂 MnBr(CO) 5实现了这种转化。内部和末端烯烃在这种转化中都表现良好,并且可以耐受一系列官能团。该反应不仅为从简单的起始原料制备γ-芳基羧酸提供了一种快速的方法,而且还将激发在有机合成中采用均相锰催化的进一步研究。
Carbonylative Transformation of Allylarenes with CO Surrogates: Tunable Synthesis of 4-Arylbutanoic Acids, 2-Arylbutanoic Acids, and 4-Arylbutanals
作者:Fu-Peng Wu、Da Li、Jin-Bao Peng、Xiao-Feng Wu
DOI:10.1021/acs.orglett.9b02047
日期:2019.7.19
In this Communication, procedures for the selective synthesis of 4-arylbutanoic acids, 2-arylbutanoic acids, and 4-arylbutanals from the same allylbenzenes have been developed. With formic acid or TFBen as the CO surrogate, reactions proceed selectively and effectively under carbon monoxide gas-free conditions.