Process for preparing 1-methoxymethyl-5,5-diphenylbarbituric...

Details Process for preparing 1-methoxymethyl-5,5-diphenylbarbituric... Process for preparing 1-methoxymethyl-5,5-diphenylbarbituric...

2006-06-20

2006-06-20

Balasubramanian, Venkataraman (Department: 1624)

Organic compounds -- part of the class 532-570 series

Organic compounds

Nitrogen attached directly or indirectly to the purine ring...

C544S302000

Reexamination Certificate

active

07064205

ABSTRACT:
The present invention provides a novel process for preparing 1-methoxymethyl-5,5-diphenylbarbituric acid. In particular, the present invention provides a process for preparing 1-methoxymethyl-5,5-diphenylbarbituric acid by reacting 1,3-bis(methoxymethyl)-5,5-diphenylbarbituric acid with a Lewis acid to selectively remove one methoxymethyl group from 1,3-bis(methoxymethyl)-5,5-diphenylbarbituric acid.

REFERENCES:
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patent: 4628056 (1986-12-01), Levitt et al.
patent: 6093820 (2000-07-01), Gutman et al.
Boron Tribromide- Encyclopedia of Reagents for Organic Synthesis- edited by Leo Pacquette, pp. 1-9, 2003.
McElvain, S.M. “5—5 Diphenyl Barbituric Acid” (J. Am. Chem. Soc.) Jul.-Dec. 1935, 57: 1303-1304.
Barnes, Harry M. and McElvain, S.M. “For further observations on the Condensation of Benzene with Alloxan” (J. Am. Chem. Soc.) Jul.-Dec. 1937, 59: 2348-2351.

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