Synthesis of pterocarpans through palladium-catalyzed oxyarylation of alkoxy-2H-chromenes with o-iodophenols
作者:Francisco V. Gaspar、Julio C.F. Barcellos、José F. Cívicos、Pedro Merino、Carmen Nájera、Paulo R.R. Costa
DOI:10.1016/j.tet.2020.131638
日期:2020.11
electron-donating (OMe) groups is studied under two experimental conditions: a) Pd(OAc)2, Ag2CO3 in PEG-400 at 140 °C, 10 min and b) oxime-based palladacycle, DIPEA, in PEG-400 at 150 °C, 3–4 h. Pterocarpans are obtained in moderate to good chemical yields.
在以下两个实验条件下研究了烷氧基-2 H-苯甲基(1a - e)与被吸电子(CHO)和供电子(OMe)基团取代的邻碘苯酚的羟基化反应:a)Pd(OAc)2,Ag在140°C下10分钟,在PEG-400中有2个CO 3; b)在150°C下3-4小时,在PEG-400中,基于肟的钯环,DIPEA。紫檀果以中等至良好的化学产率获得。