Methyl triflate → 4-[4-(Piperidine-1-sulfonyl)-4,7-diaza-spiro[2.5]oct-7-yl]-7H-pyrrolo[2,3-d]pyrimidine

Participants

Reaction Steps

A solution of 1-(imidazole-1-sulfonyl)-piperidine (intermediate 13) (0.047 mmol) in dry CH2Cl2 (1 mL) was cooled to 0° C. and added trifluoro-methanesulfonic acid methyl ester (0.047 mmol). The reaction mixture was allowed to warm up freely to rt over a period of 4 h and then concentrated in vacuo. The residual oil was redissolved in dry CH3CN (1.5 mL), added a solution of 4-(4,7-diaza-spiro[2.5]oct-7-yl)-7H-pyrrolo[2,3-d]pyrimidine (intermediate 21) (0.047 mmol) in DMSO (1 mL) and then stirred at 50° C. for 3 h. The pure compound was obtained by standard preparative HPLC purification of the reaction mixture.

Provenance & Evidence