反应详情

(±)-1-[1-(5-Fluoro-2-pyrimidinyl)-4-piperidinyl]ethyl methanesulfonate (0.24 g) was prepared as a colorless oil from 1-(5-fluoro-2-pyrimidinyl)-4-piperidinecarbaldehyde and methylmagnesium bromide (3M in Et2O) then methanesulfonyl chloride and Et3N in a manner similar to Example 139, Steps 1-2. The crude product was purified by chromatography on an ISCO silica gel column using 0 to 40% EtOAc/hexanes to give (±)-1-[1-(5-fluoro-2-pyrimidinyl)-4-piperidinyl]ethyl methanesulfonate as a colorless oil. 1H NMR (400 MHz, CDCl3): δ 8.17 (s, 2H), 4.80-4.70 (m, 2H), 4.70-4.60 (m, 1H), 2.99 (s, 3H), 2.90-2.75 (m, 2H), 1.95-1.70 (m, 3H), 1.40 (d, 3H, J=6.3 Hz), 1.35-1.25 (m, 2H); LRMS (ESI), m/z 304 (M+H).

1. customThe crude product was purified by chromatography on an ISCO silica gel column