Journal of the Chemical Society. Perkin transactions I p. 689 - 696 (1981)
Update date:2022-08-16
Topics:
Gupta, Dharmendra N.
Hodge, Philip
Khan, Naeem
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-1,5,12-trihydroxynaphthacene-6,11-quinone (21) and 2-acetyl-1,2,3,4-tetrahydro-2,5,12-trihydroxynaphthacene-6,11-quinone (7).The latter has been converted by other workers into 4-demethoxydaunomycinone (48) and 4-demethoxydaunomycin (8).
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