Acta Cryst. (2006). E62, o324-o326  [ doi:10.1107/S1600536805041899 ]

Ethyl 2-({6-amino-2-(benzylsulfanyl)-5-[2-(ethoxycarbonyl)prop-2-enyl]pyrimidin-4-yloxy}methyl)acrylate

C. L. Gibson, J. K. Huggan, A. R. Kennedy and C. J. Suckling

Abstract: A new synthesis of carbon-carbon bonds at the 5-position of 2-thiosubstituted pyrimidines via the Claisen rearrangement is reported. A direct route towards the synthesis of carbon bonds at the 5-position of 2-thiobenzyl pyrimidines when reacted with ethyl 2-(bromomethyl)acrylate at 328 K delivered the unexpected title compound, C₂₃H₂₇N₃O₅S. Structural elucidation showed this compound to have undergone O-allylation followed by ortho-Claisen rearrangement and subsequent secondary O-allylation with excess ethyl 2-(bromomethyl)acrylate. Disorder about the centre of symmetry allows it to exist as two conformers with different orientations of the phenyl group.

Online 21 December 2005

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