Quinolone analogues 7 [1-6]. Synthesis of 3-Heteroaryl-1-methylpyridazino[3,4-<i>b</i>]quinoxalin-4(1<i>H</i>)-ones
作者:Yoshihisa Kurasawa、Eisuke Kaji、Yoshihisa Okamoto、Ho Sik Kim
DOI:10.1002/jhet.5570420211
日期:2005.3
The 3-heteroaryl-1-methylpyridazino[3,4-b]quinoxalin-4(1H)-ones 6a-e were synthesized by the oxidative-hydrolytic ring transformation of the 3-heteroaryl-1,2-diazepino[3,4-b]]quinoxaline-5-carbonitriles 9a-c, which were obtained by the 1,3-dipolar cycloaddition reaction of the 2-(2-heteroarylmethylene-1-methylhydrazino)quinoxaline 4-oxides with 2-chloroacrylonitrile. The assignment of the thiophene
通过3-杂芳基-1,2-二氮杂ino [ 3,3,3,4,5,5,5-三氟环戊基]的氧化-水解环转化合成了3-杂芳基-1-甲基吡啶并[3,4- b ]喹喔啉-4(1 H)-ones 6a-e。 4- b ]喹喔啉-5-甲腈9A-C ,这是由的1,3-偶极环加成反应得到的2-(2- heteroarylmethylene -1-甲基肼基)喹喔啉-4-氧化物用2-氯丙烯腈。噻吩和呋喃环质子的分配是通过NOE,解偶联和偶合常数的数据进行的。