Nucleophilic substitutions of 2-chloronaphtho[2,3-<i>b</i>]furan-4,9-dione with amines
作者:Jyunichi Koyanagi、Masayuki Ogawa、Katsumi Yamamoto、Kouji Nakayama、Akira Tanaka
DOI:10.1002/jhet.5570350207
日期:1998.3
2-Chloronaphtho[2,3-b]furan-4,9-dione 4 was allowed to react with pyrrolidine to produce 2-(1-pyrrolidinyl)naphtho[2,3-b]furan-4,9-dione 8 in 64% yield. In a similar manner, the reaction of 4 with cyclic amines (piperidine, morpholine, 4-substituted piperazines, etc.) gave the desired compounds. 2-Dimethylaminonaphtho[2,3-b]furan-4,9-dione 20 and 2-propylaminonaphtho[2,3-b]furan-4,9-dione 23 were obtained
使2-氯萘并[2,3- b ]呋喃-4,9-二酮4与吡咯烷反应以生成2-(1-吡咯烷基)萘[2,3 - b ]呋喃-4,9-二酮8。产率64%。以类似的方式,使4与环胺(哌啶,吗啉,4-取代的哌嗪等)反应,得到所需的化合物。由4与67%的胺反应得到2-二甲基氨基萘[2,3- b ]呋喃-4,9-二酮20和2-丙基氨基萘[2,3 - b ]呋喃-4,9-二酮23产率分别为48%。此外,4的反应用无环胺(二乙胺,二丙胺,异丙胺,丁胺等)制得所需化合物。用叠氮化钠处理化合物4,以42%的产率得到2-叠氮萘并[2,3 - b ]呋喃-4,9-二酮28。所有这些亲核取代均在室温下进行。发现4显示出对胺的高反应性。出乎意料的是,由4与1-吗啉代-1-环己烯的反应获得了2-吗啉代萘并[2,3- b ]呋喃-4,9-二酮13。