53279-82-6Relevant articles and documents
Entry to 1,2,3,4-Tetrasubstituted Arenes through Addressing the " Meta Constraint" in the Palladium/Norbornene Catalysis
Dong, Guangbin,Liu, Peng,Wang, Jianchun,Xu, Xiaolong,Zhou, Yun
supporting information, p. 3050 - 3059 (2020/03/10)
Arenes with four different contiguous substituents, i.e. 1,2,3,4-tetrasubstituted arenes, are commonly found in bioactive compounds, but they are nontrivial to access via conventional methods. Through addressing the "meta constraint" in the palladium/norbornene (Pd/NBE) cooperative catalysis, which is the difficulty of tolerating a sizable meta substituent in aryl halide substrates, here a modular and regioselective approach is realized for preparing 1,2,3,4-tetrasubstituted arenes. One key is the use of a C2-amide-substituted NBE, and a combined experimental and computational study reveals its role in promoting the NBE insertion and the ortho C-H metalation steps. The scope is broad: A variety of electrophiles and nucleophiles could be introduced to the ortho and ipso positions, respectively, with 1,4-disubstituted aryl halides, leading to diverse unsymmetrical contiguous tetrasubstituted arenes. Application of this approach has been demonstrated in streamlined syntheses of several bioactive compounds.
Effect of water on the functionalization of substituted anisoles with iodine in the presence of F-TEDA-BF4 or hydrogen peroxide
Pavlinac, Jasminka,Zupan, Marko,Stavber, Stojan
, p. 1027 - 1032 (2007/10/03)
Water was found to be a convenient reaction medium for functionalization of substituted anisoles using iodine in the presence of Selectfluor F-TEDA-BF 4 or hydrogen peroxide as mediators and oxidizers. Two types of functionalization were observ
Iodination of aromatic compounds under mild and solvent-free conditions
Hajipour, Abdol R.,Ruoho, Arnold E.
, p. 647 - 651 (2007/10/03)
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