155810-87-0Relevant articles and documents
Sequential Continuous-Flow Synthesis of 3-Aryl Benzofuranones
Xin, Hai-Long,Rao, Xiaofeng,Ishitani, Haruro,Kobayashi, Shū
, p. 1906 - 1910 (2021)
A sequential continuous-flow system to produce 3-aryl benzofuranones was developed. Starting from 2,4-di-tert-butylphenol and glyoxylic acid monohydrate, both the initial cyclocondensation and the subsequent Friedel?Crafts alkylation were catalyzed by the same heterogeneous catalyst, Amberlyst-15H. The catalyst has a promising life-time for these two steps, and it was able to be recovered and reused for several runs without deactivation. By using the established flow system, 5,7-di-tert-butyl-3-(3,4-dimethylphenyl)-3H-benzofuran-2-one (Irganox HP-136), which is a commercial antioxidant, was prepared in 88% two-step yield. Reactions with various aromatic compounds proceeded well under flow conditions to afford 3-aryl benzo-furanone derivatives in high yields with good functional group compatibility.
Process for the preparation of 3-arylbenzofuranones
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, (2008/06/13)
A process for the preparation of compounds of formula I STR1 wherein the general symbols are as defined in claim 1, which comprises reacting a compound of formula III STR2 wherein the general symbols are as defined in claim 1, with a compound of formula IV
