Studies on uracils : a facile one-pot synthesis of oxazino[4,5- d]-, pyrano[2,3-d]-, pyrido[2,3-d]- and pyrimido[4,5-d]pyrimidines using microwave irradiation in the solid state

DEVI, I and BORAH , H N and BHUYAN , P J (2004) Studies on uracils : a facile one-pot synthesis of oxazino[4,5- d]-, pyrano[2,3-d]-, pyrido[2,3-d]- and pyrimido[4,5-d]pyrimidines using microwave irradiation in the solid state. Tetrahedron Letter, 45. pp. 2405-2408.

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Abstract

—N,N-Dimethyl-5-formylbarbituric acid 1 reacts with maleimide 2 and phenyl isocyanate/phenyl isothiocyanate 4 under microwave-assisted conditions in the solid phase to aﬀord pyrano[2,3-d]pyrimidines3 and oxazino[4,5-d]pyrimidines5 in excellent yields. Under identical conditions, N,N-dimethyl-6-amino-5-formyluracil 6 reacts with 2 and 4 to give pyrido[2,3-d]pyrimidine derivative 7 and pyrimido[4,5-d]pyrimidines 8 in high yields

Item Type:	Article
Subjects:	Chemistry > Organic Chemistry
Divisions:	UNSPECIFIED
Depositing User:	Dr. PK Barooah
Date Deposited:	06 Jan 2012 06:24
Last Modified:	06 Jan 2012 06:24
URI:	http://neist.csircentral.net/id/eprint/317

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