Synthesis of cyanodibenzo[1,4]dioxines and their derivatives by cyano-activated fluoro displacement reactions
作者:Geoffrey C. Eastmond、Jerzy Paprotny、Alexander Steiner、Linda Swanson
DOI:10.1039/b008508l
日期:——
new group of cyanodibenzo[1,4]dioxines have been synthesized by cyano-activated fluoro displacement reactions between cyanodifluorobenzenes and catechols in DMF at 130 °C in the presence of potassium carbonate. This route is exemplified by the synthesis of cyanodibenzo[1,4]dioxines from several substituted catechols. The reactions are virtually quantitative. Cyanodibenzo[1,4]dioxines were hydrolysed
在碳酸钾存在下,通过DMF中氰基二氟苯和邻苯二酚之间的氰基活化氟置换反应,在130°C下合成了一组新的氰基二苯并[1,4]二恶英。由几种取代的邻苯二酚合成氰基二苯并[1,4]二恶英是例证。反应实际上是定量的。将氰基苯并[1,4]二恶英在乙二醇中用氢氧化钾水解或转化为酰胺衍生物,以产生其他取代的二苯并[1,4]二恶英。氰基苯并[1,4]-二恶英是荧光的,并且给出了激发和发射数据。已经阐述了改进的4,5-二苯基芳烃和3,6-二甲基邻苯二酚的合成,后者涉及在大气压下还原酚类曼尼希碱。