Novel 3-quinoxalinyl-1,5-benzodiazepines 4, 5, 6, 9, 10 were synthesized via the ring transformation of 3-(N,N-dimethylcarbamoyl)furo[2,3-b]quinoxaline hydrochloride (1). The 3-quinoxalinyl-1,5-benzodiazepine hydrochlorides 4 and 6 are the tautomers of the N1′-H (or N5-H) form and the C3-H form, respectively, which are stable in solid and solution. However, 4 (NH form) was found to be converted into
新的3-
喹喔啉基-1,5-苯并二氮类4,5,6,9,10,合成通过3-(环改造N,N-二甲基
氨基甲)
呋喃并[2,3- b ]
喹喔啉盐酸盐(1)。3 quinoxalinyl- 1,5-苯并二氮杂盐酸盐4和6是所述N个的互变异构体1' -H(或N 5 -H)形式以及C 3 -H形式,分别,这是在固体和溶液是稳定的。但是,发现4(NH形式)转化为6(C 3-H形式)在
乙酸中回流。描述了这些互变异构体的各个光谱证据和不同的反应性。