5-Bromomethyl-2-furancarboxylic acid ethyl ester → 5-[[5-{2,8-Dimethyl-5H-dibenzo[a,d]cyclohepten-5-yl}-3,4-dihydro-2,4-dioxo-1(2H)-pyrimidinyl]methyl]-2-furancarboxylic acid, ethyl ester

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The subtitle compound was prepared from the product of example 8 step (i) (2.3 g) and 5-bromomethyl-2-furancarboxylic acid ethyl ester (J. Chem. Soc. Perkin Trans. 1, 1981, 1125, Bull. Chem. Soc. Jpn. 1987, 60, 1807) (2.3 g) according to the method of example 1 step (iv). Purification was by chromatography eluting with 25% ethyl acetate in toluene. Yield 1.8 g. Used directly in the next step.

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