80446-09-9Relevant academic research and scientific papers
Quinones and Related Compounds in Higher Plants. Part 16. Naphthoquinones from Radermachera sinica Hemsl. (Bignoniaceae)
Inoue, Kenichiro,Chen, Cheng-Chang,Inouye, Hiroyuki,Kuriyama, Kaoru
, p. 2764 - 2770 (1981)
Five new naphthoquinones, along with the known naphthoquinones lapachol (1), dehydro-α-lapachone (2), and dehydroiso-α-lapachone (3), have been isolated from the wood of Radermachera sinica Hemsl.The structures of these new quinones were established as 3-hydroxy-6-methoxydehydroiso-α-lapachone (4), 3-hydroxydehydroiso-α-lapachone (5), 3,6-dimethoxydehydroiso-α-lapachone (6), 3,5-dihydroxy-6-methoxydehydroiso-α-lapachone (7), and 2-isopropenylnaphthofuran-4,9-quinone (8).These quinones were found to be mixture of both enantiomers in various proportions, e.g., (3), 2R:2S, 4.5:1; (4), 2R,3R:2S,3S, 1:1; (5), 2R,3R:2S,3S, 4.2:1; (6), predominantly 2R,3R; and (7), predominantly 2S,3S.
