Chemistry of quinones. Part 7. Synthesis of anthracyclinone analogues via Diels–Alder reactions of 1,4-anthraquinones
作者:Dharmendra N. Gupta、Philip Hodge、Naeem Khan
DOI:10.1039/p19810000689
日期:——
Diels–Alder adducts were formed by reaction of 1,4-anthraquinone with buta-1,3-diene, with 1-acetoxy-, 1-methyl-, 2-methyl-, and 2,3-dimethyl-buta-1,3-diene, and with cyclohexa-1,3-diene. Adducts were also prepared by reaction of 9-chloro-10-hydroxy-1,4-anthraquinone with buta-1,3-diene and with 2-methylbuta-1,3-diene. Some of the linear tetracyclic adducts were transformed to 1,2,3,4-tetrahydro-1
Diels–Alder加合物是由1,4-蒽醌与1,3-二丁烯与1-乙酰氧基,1-甲基,2-甲基和2,3-二甲基-buta-1反应形成的, 3-二烯和环己-1,3-二烯。还可以通过使9-氯-10-羟基-1,4-蒽醌与buta-1,3-二烯和2-甲基buta-1,3-二烯反应来制备加合物。一些线性四环加合物被转化为1,2,3,4-四氢-1,5,12-三羟基萘-6,11-醌(21)和2-乙酰基1,2,3,4-四氢- 2,5,12-三羟基萘-6,11-醌(7)。后者已被其他工人转换为4-脱甲氧基柔红霉素(48)和4-脱甲氧基柔红霉素(8)。