2-Cyanobenzofurans and 2-cyanobenzothiophenes were prepared through an efficient one-pot Ullmann-reaction/cyanation reaction. In the presence of CuI/Na2CO3–Pd(OAc)2/PPh3 in DMF, the reaction of 2-(gem-dibromovinyl)phenols and 2-(gem-dibromovinyl)thiophenols with K4Fe(CN)6, as non-toxic and user-friendly cyanating reagent, proceeded smoothly to generate the corresponding 2-cyanobenzofurans and 2-cyanobenzothiophenes
通过有效的一锅Ullmann反应/
氰化反应制备2-
氰基
苯并呋喃和
2-氰基苯并噻吩。在
DMF中CuI / Na 2 CO 3 -Pd(OAc)2 / PPh 3的存在下,2-(宝石-二
溴乙烯基)
苯酚和2-(宝石-二
溴乙烯基)
苯硫酚与K 4 Fe(CN)6的反应作为无毒且对用户友好的
氰化试剂,该试剂可顺利进行,以高收率生成相应的2-
氰基
苯并呋喃和
2-氰基苯并噻吩。