3-(Methoxymethyl)benzeneboronic acid → N-[5-(cis-3,5-Dimethyl-1-piperazinyl)-2-(methyloxy)phenyl]-5-{3-[(methyloxy)methyl]phenyl}-2-thiophenesulfonamide

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To a mixture of 5-bromo-N-[5-(cis-3,5-dimethyl-1-piperazinyl)-2-(methyloxy)phenyl]-2-thiophenesulfonamide (E122) (100 mg, 0.22 mmol) and {3-[(methyloxy)methyl]phenyl}boronic acid (83 mg, 0.5 mmol) in DME (3 ml) was added potassium tert-butoxide (210 mg, 1.9 mmol) and tetrakis(triphenylphosphine)palladium(0) (15 mg, 0.013 mmol) in water (1 ml) and the resulting mixture stirred in a microwave (set at high absorbance) at 100° C. for 30 minutes. The resulting mixture was then concentrated in Genevac and residues passed over SCX. Basic fractions were re-concentrated in Genevac and the residue purified using mass directed autoprep HPLC to afford the title compound (E123). MS (ES+) m/e 502 [M+H]+.

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