132351-67-8Relevant articles and documents
Arylation of ortho-Hydroxyarylenaminones by Sulfonium Salts and Arenesulfonyl Chlorides: An Access to Isoflavones
Mkrtchyan, Satenik,Iaroshenko, Viktor O.
, p. 4896 - 4916 (2021/04/12)
Herein we disclose three new methods for the straightforward and efficient synthesis of 3-arylchromones following the arylation of ortho-hydroxyarylenaminones by vast diversities of bench-stable and easy-to-use sulfonium salts and arenesulfonyl chlorides.
Visible-light-mediated arylation of: Ortho -hydroxyarylenaminones: Direct access to isoflavones
Mkrtchyan, Satenik,Iaroshenko, Viktor O.
supporting information, p. 2606 - 2609 (2020/03/10)
In this work we highlight two new methods for the synthesis of isoflavones through consecutive domino arylation of ortho-hydroxyarylenaminones with in situ photogenerated aryl radicals. As precursors for aryl radicals we used aryl onium reagents such as diazonium and diaryliodonium salts. Notably, the photo-Meerwein arylation by aryl diazonium tetrafluoroborates demonstrated high efficiency in terms of yields and can be considered as a method of choice for the straightforward assembly of 3-aryl-substituted chromones. Ultimately, 26 compounds were prepared in good to excellent yields using the developed synthetic protocols.
Transient and Recyclable Halogenation Coupling (TRHC) for Isoflavonoid Synthesis with Site-Selective Arylation
Wan, Jie-Ping,Tu, Zhi,Wang, Yuyun
supporting information, p. 6907 - 6910 (2019/05/10)
A transient and recyclable C?H iodination has been designed for the synthesis of isoflavonoids through the domino reactions of o-hydroxyphenyl enaminones and aryl boronic acids in the presence of catalytic KI and Pd catalyst. Instead of the conventional cross-coupling strategy employing pre-halogenated substrates, this method transforms raw C?H bond by means of a transient C?H halogenation to smoothly relay the subsequent C-arylation. Consequently, such a method avoids the pre-functionalization for C?halogen bond installation as well as the generation of stoichiometric halogen-containing waste following the cross-coupled product, disclosing an intriguing new coupling protocol to forge the C?C bond in the virgin area between classical C?X (X=halogen) bond cross coupling and the C?H activation.