Naphthopyranquinones. Confirmation of the structures of the ventiloquinones E, G and J by synthesis

de Koning, C.B., Giles, R.G.F. and Green, I.R. (1991) Naphthopyranquinones. Confirmation of the structures of the ventiloquinones E, G and J by synthesis. Journal of the Chemical Society, Perkin Transactions 1 (11). pp. 2743-2748.

Abstract

Both ventiloquinone E (cis-3,4-dihydro-6,7,9-trimethoxy-1,3-dimethyl-1H- naphtho[2,3-c]pyran5,10-quinone) 1 and ventiloquinone G (cis-3,4-dihydro-5,7,10- trihydroxy-1,3-dimethyl-1H-naphtho[2,3-c]pyran-6,9-quinone) 3 have been synthesised and shown to be identical with natural samples isolated from the root bark of Ventilago maderaspatana. cis-3,4-Dihydro-5-hydroxy-7,10-dimethoxy- 1,3-dimethyl-1H-naphtho[2,3-c]pyran-6,9-quinone 5 has also been synthesised and found to be different to ventiloquinone J, which must then be cis-3,4-dihydro-10-hydroxy-5,7-dimethoxy-1,3-dimethyl-1H-naphtho[2,3-c]pyran-6, 9-quinone 4.

Item Type:	Journal Article
Murdoch Affiliation(s):	School of Mathematical and Physical Sciences
Publisher:	Royal Society of Chemistry
URI:	http://researchrepository.murdoch.edu.au/id/eprint/35717

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