An efficient synthesis of uracil derivatives from 2-alkyl-Δ2-oxazolines and nitriles
摘要:
An efficient a rid convenient synthesis of new fluorinated a rid non-fluorinated uracils is described herein. The condensation of nitriles with enolates generated from 2-alkyl-Delta(2)-oxazolines affords fluorinated beta-enamino acid derivatives, which react with triphosgene to give an isomeric mixture of oxazolopyrimidinones. These can then be easily transformed into a single C-6 pyrimidindione derivative through reaction with a suitable nucleophile. (c) 2008 Elsevier B.V. All rights reserved.
A pyrimidinedione derivative which is a compound of formula (I): ##STR1## in which: R1 denotes hydrogen, a halogen, a methyl group or a methoxy group, R2 denotes hydrogen, a C.sub.1 -C.sub.4 alkyl group or a benzyl group, n denotes 2, 3 or 4, X denotes a CH group or nitrogen, and R3 denotes hydrogen, a halogen or a methoxy group when X denotes a CH group, with the proviso that R3 denotes hydrogen when X denotes nitrogen, or a pharmacologically acceptable acid addition salt thereof.
An efficient synthesis of uracil derivatives from 2-alkyl-Δ2-oxazolines and nitriles
作者:Santos Fustero、Juan F. Sanz-Cervera、Salvador Mérida、Raquel Román、Salvador Villanova、Carmen Ramírez de Arellano
DOI:10.1016/j.jfluchem.2008.04.004
日期:2008.9
An efficient a rid convenient synthesis of new fluorinated a rid non-fluorinated uracils is described herein. The condensation of nitriles with enolates generated from 2-alkyl-Delta(2)-oxazolines affords fluorinated beta-enamino acid derivatives, which react with triphosgene to give an isomeric mixture of oxazolopyrimidinones. These can then be easily transformed into a single C-6 pyrimidindione derivative through reaction with a suitable nucleophile. (c) 2008 Elsevier B.V. All rights reserved.