N-(4-Methoxybenzyl)pyridin-2-amine → 6-chloro-N-(3-fluoropyridin-4-yl)-8-((4-methoxybenzyl)(pyridin-2-yl)amino)imidazo[1,2-b]pyridazine-3-carboxamide

HRID 1943402

반응식

HRID 1943402 반응식
[Cl:1][C:2]1[CH:3]=[C:4](Cl)[C:5]2[N:6]([C:8]([C:11]([NH:13][C:14]3[CH:19]=[CH:18][N:17]=[CH:16][C:15]=3[F:20])=[O:12])=[CH:9][N:10]=2)[N:7]=1.BrC1C2N(C(C(NC3C=CN=CC=3F)=O)=CN=2)N=C(Cl)C=1.[CH3:43][O:44][C:45]1[CH:58]=[CH:57][C:48]([CH2:49][NH:50][C:51]2[CH:56]=[CH:55][CH:54]=[CH:53][N:52]=2)=[CH:47][CH:46]=1.CC(C)([O-])C.[K+]>C1COCC1>[Cl:1][C:2]1[CH:3]=[C:4]([N:50]([CH2:49][C:48]2[CH:47]=[CH:46][C:45]([O:44][CH3:43])=[CH:58][CH:57]=2)[C:51]2[CH:56]=[CH:55][CH:54]=[CH:53][N:52]=2)[C:5]2[N:6]([C:8]([C:11]([NH:13][C:14]3[CH:19]=[CH:18][N:17]=[CH:16][C:15]=3[F:20])=[O:12])=[CH:9][N:10]=2)[N:7]=1

참가 물질

6

반응물 4

HCID 97452N-(4-Methoxybenzyl)pyridin-2-amineHCID 23665647Potassium tert-butoxideHCID 596244958-Bromo-6-chloro-N-(3-fluoropyridin-4-yl)imidazo[1,2-b]pyridazine-3-carboxamideHCID 596245496,8-Dichloro-N-(3-fluoropyridin-4-yl)imidazo[1,2-b]pyridazine-3-carboxamide

생성물 1

HCID 596246786-chloro-N-(3-fluoropyridin-4-yl)-8-((4-methoxybenzyl)(pyridin-2-yl)amino)imidazo[1,2-b]pyridazine-3-carboxamide수율 68.5%

시약·촉매·용매 1

HCID 8028Tetrahydrofuran용매2회

실험 절차

To a suspension containing a mixture of 6,8-dichloro-N-(3-fluoropyridin-4-yl)imidazo[1,2-b]pyridazine-3-carboxamide and 8-bromo-6-chloro-N-(3-fluoropyridin-4-yl)imidazo[1,2-b]pyridazine-3-carboxamide 5A (1.2 g, 3.68 mmol) was added N-(4-methoxybenzyl)pyridin-2-amine (1.183 g, 5.52 mmol) in THF (36.8 mL) at 0° C. This mixture was charged with a 1M solution of potassium tert-butoxide (7.36 mL, 7.36 mmol), slowly via syringe. The dark suspension was stirred for 20 min at room temperature. Volatiles were removed in vacuo and the resulting residue was triturated with MeOH and cooled to 0° C. Filtration, with cold MeOH washes afforded a tan solid which was dissolved in THF and azeotroped with PhMe to remove residual MeOH, then dried in vacuo overnight, which afforded 6-chloro-N-(3-fluoropyridin-4-yl)-8-((4-methoxybenzyl)(pyridin-2-yl)amino)imidazo[1,2-b]pyridazine-3-carboxamide (1.31 g, 68.5% yield) as a tan solid. LC/MS, m/z 504.0 (M+1). HPLC Rt=4.265 min. YMC S5 ODS-A column (4.6×50 mm) 0%-100% B. Solvent B: (90% MeOH, 10% H2O, 0.2% H3PO4). Solvent A: (10% MeOH, 90% H2O, 0.2% H3PO4). Gradient, start % B=0, final % B=100, gradient time 4 min, hold at 100% 1 min, flow rate 4 mL/min. 1H NMR (400 MHz, DMSO-d6) δ ppm 11.02 (1H, d, J=2.27 Hz), 8.62 (1H, d, J=2.27 Hz), 8.35-8.48 (4H, m), 8.23 (1H, s), 7.67-7.83 (1H, m), 7.32 (2H, dd, J=8.56, 2.27 Hz), 7.24 (1H, dd, J=7.05, 5.29 Hz), 7.00 (1H, s), 6.79-6.89 (2H, m), 5.60 (2H, s), 3.62-3.72 (3H, s).

후처리

  1. additionTo a suspension containing
  2. customVolatiles were removed in vacuo
  3. customthe resulting residue was triturated with MeOH
  4. temperaturecooled to 0° C
  5. filtrationFiltration
  6. customwith cold MeOH washes afforded a tan solid which
  7. customazeotroped with PhMe
  8. customto remove residual MeOH
  9. customdried in vacuo overnight, which

출처 및 근거

ORD 기록
ord-f84adea6c40a40c1a0aaf85734259dcc
출처 데이터셋
uspto-grants-2013_03
특허 번호
US08389527B2

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