Reactivity of 2,1-Benzisoxazole in Palladium-Catalyzed Direct Arylation with Aryl Bromides
作者:Mohand Aidene、Fatma Belkessam、Jean-François Soulé、Henri Doucet
DOI:10.1002/cctc.201600047
日期:2016.4.20
The Pd‐catalyzed direct arylation of 2,1‐benzisoxazole with aryl bromides to access 3‐arylbenzoisoxazoles proceeds in moderate‐to‐high yields with 1 mol % Pd(OAc)2 or 2 mol % PdCl(C3H5)(dppb) (dppb=1,4‐bis(diphenylphosphino)butane) as the catalysts and KOAc as an inexpensive base. A wide variety of (hetero)aryl bromides have been employed successfully. Moreover, arylations followed by benzisoxazole
Pd催化2,1-苯并恶唑与芳基溴的直接芳基化反应以生成3-芳基苯并异恶唑,其产率为中至高,产率为1 mol%Pd(OAc)2或2 mol%PdCl(C 3 H 5)(dppb )(dppb = 1,4-双(二苯基膦基)丁烷)作为催化剂,KOAc作为便宜的碱。已经成功地使用了各种各样的(杂)芳基溴化物。此外,芳基化反应后再开苯并异恶唑开环,仅需两个步骤即可制备2-氨基二苯甲酮。