755027-21-5Relevant articles and documents
Pd-Catalyzed ipso, meta-Dimethylation of ortho-Substituted Iodoarenes via a Base-Controlled C-H Activation Cascade with Dimethyl Carbonate as the Methyl Source
Wu, Zhuo,Wei, Feng,Wan, Bin,Zhang, Yanghui
supporting information, p. 4524 - 4530 (2021/05/04)
A methyl group can have a profound impact on the pharmacological properties of organic molecules. Hence, developing methylation methods and methylating reagents is essential in medicinal chemistry. We report a palladium-catalyzed dimethylation reaction of ortho-substituted iodoarenes using dimethyl carbonate as a methyl source. In the presence of K2CO3 as a base, iodoarenes are dimethylated at the ipso- and meta-positions of the iodo group, which represents a novel strategy for meta-C-H methylation. With KOAc as the base, subsequent oxidative C(sp3)-H/C(sp3)-H coupling occurs; in this case, the overall transformation achieves triple C-H activation to form three new C-C bonds. These reactions allow expedient access to 2,6-dimethylated phenols, 2,3-dihydrobenzofurans, and indanes, which are ubiquitous structural motifs and essential synthetic intermediates of biologically and pharmacologically active compounds.
NEW COMPOUND HAVING FGFR INHIBITORY ACTIVITY AND PREPARATION AND APPLICATION THEREOF
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Paragraph 0376; 0377, (2019/05/30)
The present invention relates to a new compound having an FGFR inhibitory activity and preparation and application thereof. In particular, the compound according to the present invention has a structure as shown in formula I, wherein each group and substituent are as defined in the description. Also disclosed in the present invention are a preparation method for the compound and a use thereof in preparation of a drug for treating and/or preventing a tumor-related disease and/or an FGFR-related disease.
Mild and selective organocatalytic iodination of activated aromatic compounds
Jakab, Gergely,Hosseini, Abolfazl,Hausmann, Heike,Schreiner, Peter R.
supporting information, p. 1635 - 1640 (2013/07/27)
We describe an organocatalytic iodination of activated aromatic compounds using 1,3-diiodo-5,5-dimethylhydantoin (DIH) as the iodine source with thiourea catalysts in acetonitrile. The protocol is applicable to a number of aromatic substrates with significantly different steric and electronic properties. The iodination is generally highly regioselective and provides high yields of isolated products. NMR kinetic investigations conducted in THF-d 8indicate the role of sulfur in the thiourea motif as a nucleophile that is assisted by H-bonding in the key steps of the reaction. Georg Thieme Verlag Stuttgart . New York.