Method of producing shikonin

Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal

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260396K, C07C 5014, C07C 5012

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045605114

ABSTRACT:
A method of producing shikonin, having the following chemical structure ##STR1## which method comprises dehydrating 2-(1'-acetoxy-4'-hydroxy-4'-methylpentyl)-5,8-diacetoxy-1,4-naphthoquinone , treating the resulting product with an alkali hydroxide and acidifying the treated product.

REFERENCES:
patent: 4282250 (1981-08-01), Papageorgiou
Tetrahedron Letters, No. 19(1959) pp. 9-13, Farina, "A New Method for the Preparation of Naphtozorims."
Patai, The Chemistry of the Quinonoid Compounds, part 1, 1974, p. 134.
Y. N. Shukla et al., Experientia 25, 357 (1969).
U. Sankawa et al., Chem. Pharm. Bull. (Tokyo) 25, (9), 2392-2395 (1977).
U. Sankawa et al., Chem. Pharm. Bull. (Tokyo) 29, (1) 116-122, (1981).
M. Tabata et al., Abstract of Papers, 100th Annual Meeting of Pharm. Society of Japan (1980) p. 249.

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