반응 #47672

반응 방정식

1-(3-amino-pyrazol-1-yl)-2-methyl-propan-2-ol

(S)-2-[4-(2,3-dichloro-phenoxy)-2-oxo-2,5-dihydro-pyrrol-1-yl]-4-methyl-pentanoic acid [1-((R)-2,3-dihydroxy-propyl)-1H-pyrazol-3-yl]-amide hydrochloride

N,N-diisopropylethylamine

benzotriazol-1-yl-oxy-tris(dimethylamino)phosphonium hexafluorophosphate

(S)-4-methyl-2-[4-(2-methyl-benzooxazol-4-yloxy)-2-oxo-2,5-dihydro-pyrrol-1-yl]-pentanoic acid methyl ester

lithium hydroxide monohydrate

→

(S)-4-methyl-2-[4-(2-methyl-benzooxazol-4-yloxy)-2-oxo-2,5-dihydro-pyrrol-1-yl]-pentanoic acid [1-(2-hydroxy-2-methyl-propyl)-1H-pyrazol-3-yl]-amide

수율 52.2%

용매

N,N-dimethylformamide

tetrahydrofuran

water

반응 조건

후처리

1. 1
   농축The mixture was concentrated in vacuo
2. 2
   workup.ADDITIONthe residue treated with acetonitrile
3. 3
   농축concentrated in vacuo (repeated 2 additional times)
4. 4
   온도to warm to room temperature
5. 5
   workup.STIRRINGstirred for 18 h
6. 6
   농축The mixture was concentrated in vacuo
7. 7
   workup.DISSOLUTIONthe residue dissolved in ethyl acetate
8. 8
   세척the resulting solution was washed with aqueous saturated ammonium chloride solution, brine
9. 9
   건조dried over sodium sulfate
10. 10
    여과The mixture was filtered
11. 11
    농축concentrated in vacuo
12. 12
    기타the residue purified by ISCO flash column chromatography (Silicycle 40 g, 5% to 100% ethyl acetate/hexanes) which

실험 절차

A solution of (S)-4-methyl-2-[4-(2-methyl-benzooxazol-4-yloxy)-2-oxo-2,5-dihydro-pyrrol-1-yl]-pentanoic acid methyl ester (0.570 g, 1.59 mmol) in tetrahydrofuran (10 mL) and water (10 mL) was treated with lithium hydroxide monohydrate (0.134 g 3.12 mmol) and the resulting mixture stirred at room temperature for 1.5 h. The mixture was concentrated in vacuo and the residue treated with acetonitrile, and concentrated in vacuo (repeated 2 additional times). The resulting solid was treated with N,N-dimethylformamide (10 mL) and 1-(3-amino-pyrazol-1-yl)-2-methyl-propan-2-ol (prepared in U.S. Pat. Appl. US2008021032 Example 80, 0.371 g, 2.39 mmol), N,N-diisopropylethylamine (0.820 g, 6.34 mmol) and benzotriazol-1-yl-oxy-tris(dimethylamino)phosphonium hexafluorophosphate (2.811 g, 6.35 mmol) at 0° C. The reaction mixture was allowed to warm to room temperature and stirred for 18 h. The mixture was concentrated in vacuo, the residue dissolved in ethyl acetate, and the resulting solution was washed with aqueous saturated ammonium chloride solution, brine and dried over sodium sulfate. The mixture was filtered and concentrated in vacuo and the residue purified by ISCO flash column chromatography (Silicycle 40 g, 5% to 100% ethyl acetate/hexanes) which afforded (S)-4-methyl-2-[4-(2-methyl-benzooxazol-4-yloxy)-2-oxo-2,5-dihydro-pyrrol-1-yl]-pentanoic acid [1-(2-hydroxy-2-methyl-propyl)-1H-pyrazol-3-yl]-amide (400 mg, 52%) as a light yellow solid: HR-ES-MS m/z calculated for C25H31N5O5 [M+H]+ 482.2398, observed 482.2398; 1H NMR (300 MHz, DMSO-d6) δ ppm 0.90 (d, J=6.0 Hz, 3H), 0.94 (d, J=6.0 Hz, 3H), 1.05 (br. s., 3H), 1.06 (br. s., 3H), 1.37-1.64 (m, 2H), 1.65-1.85 (m, 1H), 2.62 (s, 3H), 3.89 (s, 2H), 4.24 (d, J=18.1 Hz, 1H), 4.62 (d, J=18.1 Hz, 1H), 4.67 (s, 1H), 4.83 (s, 1H), 4.89 (dd, J=11.0, 3.8 Hz, 1H), 6.45 (s, 1H), 7.29 (d, J=7.8 Hz, 1H), 7.42 (t, J=7.8 Hz, 1H), 7.54 (s, 1H), 7.64 (d, J=7.8 Hz, 1H), 10.80 (s, 1H).

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