[Br:1][CH2:2][C:3]1[CH:11]=[CH:10][C:6]([C:7]([OH:9])=[O:8])=[CH:5][CH:4]=1.[CH3:12][Si](C=[N+]=[N-])(C)C.N#N.CCCCCC>CO.C1(C)C=CC=CC=1.C(OCC)(=O)C>[Br:1][CH2:2][C:3]1[CH:11]=[CH:10][C:6]([C:7]([O:9][CH3:12])=[O:8])=[CH:5][CH:4]=1To a solution of 1.0 eq of 4-(bromomethyl)benzoic acid in 20 ml of methanol and 50 ml of toluene; was added dropwise 2.05 eq of trimethylsilyldiazomethane while stirring at room temperature. The reaction was titrated until a persistant pale yellow color existed from the addition of excess trimethylsilyldiazo- methane. Let stir at room temperature for 1 hr to insure the complete evolution of N2. Thin layer chromatography in 1:1 hexane:ethyl acetate indicated the disappearance of starting material and the appearance of desired ester with an Rf of 0.7.
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