method of 2‐styrylbenzoxazoles by oxidative intramolecular cyclization of styrylphenolic Schiff bases with thianthrene cation (Th+.ClO4−) is described. The oxidative cyclization of Schiff bases in the presence of 2,6‐di‐tert‐butyl‐4‐methylpyridine (DTBMP) gives 2‐styrylbenzoxazole derivatives in better yields than those in the absence of DTBMP.
通过与
噻蒽阳离子styrylphenolic席夫碱氧化分子内环化(TH的2-
苯乙烯苯并恶唑甲简单而快速的方法制备。+ CLO 4 - )进行说明。在没有2,6-二叔丁基-4-
甲基吡啶(DT
BMP)的情况下,席夫碱的氧化环化产生的2-
苯乙烯基
苯并恶唑衍
生物的收率要高于不存在DT
BMP的情况。