作者:Sisir K. Sengupta、S. Karin Tinter、Edward J. Modest
DOI:10.1002/jhet.5570150128
日期:1978.1
Condensation of a tricyclic phenoxazin-2-amino-3-one (a model for the actinomycin D ring system) with acetaldehyde or benzaldehyde or with pyruvic acid as an acetaldehyde precursor gave tetracyclic 5H-oxazolo[4,5-b]phenoxazines. The pyruvic acid reaction proceeds efficiently in one step. The latter compounds were oxidized in a novel reaction by 2,3-dichloro-5,6-dicyano-benzoquinone exclusively at position
将三环苯恶嗪-2-氨基-3-酮(放线菌素D环系统的模型)与乙醛或苯甲醛或丙酮酸作为乙醛前体进行缩合,得到四环5 H-恶唑并[4,5- b ]苯恶嗪。丙酮酸反应有效地进行一步。后者化合物在新颖的反应中仅在苯环类化合物环的8位被2,3-二氯-5,6-二氰基-苯并醌所氧化。报告了Uv,ir,nmr和质谱数据。