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US 4,065,509 AGranted
Synthesis of .beta.-methyl derivatives of 2,4-dicarba-closo-heptaborane-7
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorsJerome F. Ditter, Eugene B. Klusmann
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Abstract
The .beta.-methylation of 2,4-dicarba-closo-heptaborane-7 through the reaon of methyl chloride with the parent carborane in the presence of metal trichloride selected from the group consisting of aluminum chloride and ferric chloride in a methyl chloride-to-carborane mole ratio from 1:1 to 6:1 and a metal trichloride-to-carborane from 0.3:1 to 5:1 at a temperature from about 30.degree. C to about 60.degree. C and at a pressure of at least 50 psig.
Claims6
A method for B-methylating 2,4-dicarba-closo-heptaborane which comprises:
- admixing 2,4-dicarba-closo-heptaborane with methyl chloride in the presence of a metal trichloride in a trichloride-heptaborane mole ratio from 0.3:1 to about 5:1 in a reaction vessel;
- heating said reaction mixture to a temperature from about 30.degree. to about 60.degree. C;
- maintaining a pressure in said reaction vessel of at least 50 psig.
Dependencies are inferred from the claim text.