作者:Jyunichi Koyanagi、Katsumi Yamamoto、Kouji Nakayama、Akira Tanaka
DOI:10.1002/jhet.5570320432
日期:1995.7
Reaction of the parent naphtho[2,3-b]furan-4,9-dione 2 with various electrophilic reagents was difficult, and only nitration of 2 gave small amounts of 2-nitronaphtho[2,3-b]furan-4,9-dione 4. Then 2-acetylnaphtho[2,3-b]furan-4,9-dione 1 was not obtained by the acetylation of 2. On the other hand, compound 1 that is isolated from Tabebuia Cassinoides and has cytotoxic activity, was obtained from 3-lithiofuran
母体萘并[2,3 - b ]呋喃-4,9-二酮2与各种亲电试剂的反应很困难,仅硝化2会产生少量2-硝基萘并[2,3 - b ]呋喃-4, 9-二酮4。然后通过2的乙酰化未得到2-乙酰基萘[2,3- b ]呋喃-4,9-二酮1。另一方面,从5-噻吩呋喃中分离出具有毒活性的化合物1,该化合物1是从3-硫代呋喃中分五个步骤制得的。