Preparation of vitamins K.sub.3 and K.sub.4 and derivatives

Details Preparation of vitamins K.sub.3 and K.sub.4 and derivatives Preparation of vitamins K.sub.3 and K.sub.4 and derivatives

1982-10-18

1984-11-13

Hollrah, Glennon H.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260396R, C07C 5014

Patent

active

044824920

ABSTRACT:
Vitamin K.sub.3 (I; 2-methylnaphtho-1,4-quinone), vitamin K.sub.4 (IIa; 2-methyl-1,4-dihydroxynaphthalene) and vitamin K.sub.4 diacetate (IIb) are prepared by reacting 1-acetoxy-buta-1,3-diene (IV) with methylbenzoquinone (V) to give the novel compounds IIIa and IIIb ##STR1## and, for the preparation of IIa, deacetylating these compounds, or, for the preparation of IIb, deacetylating these compounds and at the same time reacting them with acetic anhydride, or, for the preparation of I, deacetylating these compounds and at the same time oxidizing them.

REFERENCES:
patent: 2348976 (1944-05-01), Hyman
patent: 2352189 (1944-06-01), Fernholz
patent: 2379460 (1945-07-01), Scott
patent: 2585229 (1952-02-01), Coover, Jr. et al.
Vitamine, VEB Gustav Fischer Verlag, Jena, 1965, pp. 1050-1056.
Houben-Weyl, vol. VII/3a, (1977), pp. 80-85.
Hill and Carlson, Journal of Organic Chemistry, vol. 30, pp. 2414-2417, "A Direct Method for the Construction of Benzene Rings", 1965.

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