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US 4,234,746 AGranted
Metallo-substituted naphthalene
AssigneeThe Regents of the University of California
InventorsHenry Rapoport, Clinton D. Snyder
Life of this patent
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Abstract
3-Prenyl-substituted menaquinones are made by reacting a 3-metallo-2-alkyl-1,4-di(alkoxy or aralkoxy) naphthalene with a prenyl halide, and then oxidizing the resulting 3-prenyl-2-alkyl-1,4-di(alkoxy or aralkoxy) naphthalene to prepare the corresponding 3-prenyl-substituted menaquinone. The metallo substituent at the 3-position may be Li, Li/Cu, Cu or MgBr. The oxidation is advantageously conducted by the use of argentic oxide.
Claims3
Compounds of the formula ##STR4## wherein R is lower alkyl and R.sub.1 and R.sub.2 are lower alkyl, or aralkyl of 7 to about 12 carbon atoms, and M is MgBr.
Dependencies are inferred from the claim text.