Potassium Carbonate → methyl 5-[6-({[tert-butyl(dimethyl)silyl]oxy}methyl)-3H-imidazo[4,5-c]pyridin-3-yl]-3-{1-[2-(trifluoromethyl)phenyl]ethoxy}thiophene-2-carboxylate

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Reaction Steps

In a similar manner as described for example B3, 8.0 g of an isomeric mixture of methyl 5-[6-({[tert-butyl(dimethyl)silyl]oxy}methyl)-3H-imidazo[4,5-c]pyridin-3-yl]-3-hydroxythiophene-2-carboxylate and methyl 5-[6-({[tert-butyl(dimethyl)silyl]oxy}methyl)-1H-imidazo[4,5-c]pyridin-1-yl]-3-hydroxythiophene-2-carboxylate (example C3) and 3.15 g of K2CO3 and 5.95 g of 1-(1-bromoethyl)-2-(trifluoromethyl)benzene in 240 ml anhydrous N,N-dimethylformamide yield compound B25a and compound B25b.

Provenance & Evidence