Reaktion #1871012

Reaktionsgleichung

boron tribromide

N-[1-(cyclopropylsulfonyl)piperidin-4-yl]-4-[6-(4-fluoro-3-methoxyphenyl)imidazo[2,1-b][1,3]thiazol-5-yl]pyrimidin-2-amine

→

title compound

Ausbeute 86.0%

5-[5-(2-{[1-(cyclopropylsulfonyl)piperidin-4-yl]amino}pyrimidin-4-yl)imidazo[2,1-b][1,3]thiazol-6-yl]-2-fluorophenol

Ausbeute 86.0%

Lösungsmittel

methylene chloride

methylene chloride

Reaktionsbedingungen

Aufarbeitung

1. 1
   SonstigeThe mixture was quenched by the addition of methanol (900 μl) at −78° C.
2. 2
   workup.ADDITIONThe mixture was diluted with methylene chloride (100 ml)
3. 3
   Waschenwashed with three portions of 25 ml of saturated sodium bicarbonate solution, two portions of 25 ml of water and two portions of 25 ml of saturated sodium chloride solution
4. 4
   TrocknenThe organic phase was dried over sodium sulfate
5. 5
   Einengenconcentrated in vacuo
6. 6
   Sonstigegiving a yellow solid
7. 7
   SonstigeThe crude product was purified by flash chromatography (ethyl acetate)

Vorschrift

The N-[1-(cyclopropylsulfonyl)piperidin-4-yl]-4-[6-(4-fluoro-3-methoxyphenyl)imidazo[2,1-b][1,3]thiazol-5-yl]pyrimidin-2-amine (0.226 g, 0.43 mmol) in methylene chloride (8 ml) was cooled to −78° C. and slowly treated with 1 molar solution of boron tribromide in methylene chloride (3.4 ml). The reaction mixture was kept at −78° C. for one hour then was allowed to warm to room temperature for two hours. The mixture was quenched by the addition of methanol (900 μl) at −78° C. and was stirred at room temperature for an additional hour. The mixture was diluted with methylene chloride (100 ml) and washed with three portions of 25 ml of saturated sodium bicarbonate solution, two portions of 25 ml of water and two portions of 25 ml of saturated sodium chloride solution. The organic phase was dried over sodium sulfate and concentrated in vacuo, giving a yellow solid. The crude product was purified by flash chromatography (ethyl acetate), affording 0.19 g (86%) of the title compound as a beige solid. M.p.=224-225° C. 400 MHz 1H NMR (DMSO-d6 at 60° C.) δ: 9.82 (s, 1H), 8.67 (br. s, 1H), 8.12 (d, J=5.5 Hz, 1H), 7.43 (d, J=4.3 Hz, 1H), 7.25-7.14 (m, 3H), 6.99 (ddd, J=8.2, 4.3, 2.0 Hz, 1H), 6.41 (d, J=5.1 Hz, 1H), 3.95-3.84 (m, 1H), 3.68-3.60 (m, 2H), 3.00 (td, J=11.9, 2.7 Hz, 2H), 2.59-2.52 (m, 1H), 2.06-1.98 (m, 2H), 1.66-1.54(m, 2H), 1.04-0.92 (m, 4H). LCMS: 515 [M+H]. Calc. for C23H23N6O3S2F.0.53 diethyl ether.0.17 water: C, 53.46; H, 4.93; N, 14.89. Found C, 53.46; H, 4.60; N, 14.88.

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