21009-99-4Relevant articles and documents
Water-soluble dendrimers as photochemical reaction media: Chemical behavior of singlet and triplet radical pairs inside dendritic reaction cavities
Kaanumalle, Lakshmi S.,Nithyanandhan, Jayaraj,Pattabiraman, Mahesh,Jayaraman, Narayanaswamy,Ramamurthy
, p. 8999 - 9006 (2004)
Water-soluble poly(alkyl aryl ether) dendrimers have been explored for their use as hosts of organic substrates in aqueous media. Prototypical photoreactions, namely, photo-Fries reaction of (a) 1-naphthyl benzoate and (b) 1-naphthyl phenyl ester and α-cleavage reaction of (a) dibenzyl ketones and (b) benzoin alkyl ethers, have been examined. We find that a dendritic microenvironment not only restricts the mobility of radical intermediates but also rigidly encapsulates the substrate, intermediates, and products from "leaking" to the bulk environment. Comparative studies of the same photoreactions in micellar media demonstrate that dendritic media offer much better constrainment than the micelles.
Water-Tolerant ortho-Acylation of Phenols
Dong, Shuang-Feng,Gao, Zhi-Yuan,He, Yu,Liu, Xu,Loh, Teck-Peng,Tian, Jie-Sheng,Wu, Peng
supporting information, p. 6594 - 6598 (2021/09/02)
A metal-free, water-tolerant, and one-pot process for ortho-acylation of phenols promoted by the iodine source/hydrogen peroxide system has been developed. This transformation undergoes ether formation, iodocyclization, C-C bond cleavage, and oxidative hydrolysis in a one-step manner, which is supported by control experiments.
Synthesis of 2-acylphenol and flavene derivatives from the ruthenium-catalyzed oxidative c-h acylation of phenols with aldehydes
Lee, Hanbin,Yi, Chae S.
supporting information, p. 1899 - 1904 (2015/03/18)
The cationic ruthenium hydride complex [(C6H6)(PCy3)(CO)RuH]+BF4- has been found to be an effective catalyst for the oxidative C-H coupling reaction of phenols with aldehydes to give 2-acylphenol compounds. The coupling of phenols with α,β-unsaturated aldehydes selectively gives the flavene derivatives. The catalytic method mediates direct oxidative C-H coupling of phenol and aldehyde substrates without using any metal oxidants or forming wasteful byproducts. A cationic ruthenium hydride complex catalyzes the oxidative C-H coupling of phenols with aldehydes to form 2-acylphenol and flavene derivatives.
Pd-catalyzed oxidative acylation of 2-phenoxypyridines with alcohols via C-H bond activation
Kim, Minyoung,Sharma, Satyasheel,Park, Jihye,Kim, Mirim,Choi, Yeonhee,Jeon, Yukyoung,Kwak, Jong Hwan,Kim, In Su
, p. 6552 - 6559 (2013/07/25)
A palladium-catalyzed oxidative acylation of 2-phenoxypyridines with benzylic and aliphatic alcohols via C-H bond activation is described. This protocol represents direct access to biologically active ortho-acylphenol derivatives, and provides new opportunities to use readily available alcohols as starting materials for catalytic acylation reactions.
