1-[(5-Bromo-2-thienyl)sulfonyl]-4-methylpiperazine → 5-(4-Chloro-3-methyl-phenyl)-7-difluoromethyl-3-[5-(4-methyl-piperazine-1-sulfonyl)-thiophen-2-ylethynyl]-pyrazolo[1,5-a]pyrimidine

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Reaction Steps

The title compound was prepared from 5-(4-chloro-3-methyl-phenyl)-7-difluoromethyl-3-ethynyl-pyrazolo[1,5-a]pyrimidine (example C.16) (159 mg, 0.5 mmol) and 1-(5-bromo-thiophene-2-sulfonyl)-4-methyl-piperazine (example B.50) (163 mg, 0.5 mmol) according to general procedure II. Obtained as a yellow solid (200 mg, 71%). MS (ISP) 562.3 [(M+H)+]; mp 191° C.

Provenance & Evidence