36914-79-1Relevant articles and documents
Ligand-Promoted Palladium-Catalyzed C?H Acetoxylation of Simple Arenes
Valderas, Carolina,Naksomboon, Kananat,Fernández-Ibá?ez, M. ángeles
, p. 3213 - 3217 (2016/10/24)
The palladium-catalyzed C?H oxidation of simple arenes is an attractive strategy to obtain phenols, which have many applications in the fine chemicals industry. Although some advances have been made in this research area, low reactivity and selectivity are, in general, observed. This report describes a new catalytic system for the efficient C?H acetoxylation of simple arenes based on Pd(OAc)2 and a pyridinecarboxylic acid ligand.
Polymer-supported gadolinium triflate as a convenient and efficient Lewis acid catalyst for acetylation of alcohols and phenols
Yoon, Hyo-Jin,Lee, Sang-Myung,Kim, Jong-Ho,Cho, Hong-Jun,Choi, Jung-Woo,Lee, Sang-Hyeup,Lee, Yoon-Sik
, p. 3165 - 3171 (2008/09/20)
A polymer-supported gadolinium triflate (CMPS-IM-Gd) catalyst was prepared from chloromethyl polystyrene (CMPS) resin using a simple and convenient procedure. This polymeric catalyst was used as an efficient Lewis acid catalyst for the acetylation of various alcohols and phenols with acetic anhydride, affording high yields under mild conditions. The reaction was completed in a short period of time with small amounts of the catalyst. The catalyst was reused over 10 times without any significant loss of its catalytic activity.
The Synthesis and Transition Temperatures of Ester Derivatives of 2-Fluoro-4-hydroxy- and 3-Fluoro-4-hydroxybenzonitriles also Incorporating Aliphatic Ring Systems
Kelly, Stephen M.,Schad, Hanspeter
, p. 1580 - 1587 (2007/10/02)
The synthesis and liquid-crystal transition temperatures of forty ester derivatives of 2-fluoro-4-hydroxybenzonitrile and 3-fluoro-4-hydroxybenzonitrile are reported.The esters contain the trans-1,4-disubstituted cyclohexane or the 1,4-disubstituted bicyclooctane rings (some contain an additional phenyl ring).Many of the novel F-substituted esters exhibit substantially higher nematic-isotropic transition temperatures than the corresponding unsubstituted esters.The order of clearing points of these laterally substituted esters differing only in the presence of a benzene ring and the above-mentioned rings is established.