Persulphate oxidations. Part VI. Oxidation of biphenyl-2-carboxamides
作者:A. R. Forrester、A. S. Ingram、R. H. Thomson
DOI:10.1039/p19720002847
日期:——
Persulphate oxidation of a series of N- and ring-substituted biphenyl-2-carboxamides gave the corresponding phenanthridones in yields ranging from 2 to 97%. Usually the phenanthridone was accompanied by small quantities of the appropriate dibenzo[b,d]pyran-6-one, both products arising via the same amidyl radical, which can cyclise on nitrogen or on oxygen. Oxidation of 2′-substituted biphenyl-2-carboxamides
一系列N-和环取代的联苯-2-羧酰胺的过硫酸盐氧化得到相应的菲啶酮,产率为2%至97%。通常,菲啶酮伴随有少量适当的二苯并[ b,d ]吡喃-6-酮,这两种产物都是通过相同的酰胺基产生的,该酰胺基可以在氮或氧上环化。2'-取代的联苯-2-羧酰胺的氧化通常导致2'-取代基的消除和在氧上的优先环化;2-酰基氨基联苯的类似处理产生低产率的N-酰基咔唑。