Formaldehyde → 2-[4-chloro-5-methyl-3-(trifluoromethyl)pyrazol-1-yl]-1-[1-(4-fluorophenyl)-6,7-dihydro-5H-pyrazolo[4,3-b]pyridin-4-yl]-3-methoxy-propan-1-one

HRID 710662Notes

Reaction equation

HRID 710662 reaction equation
[Cl:1][C:2]1[C:3]([C:27]([F:30])([F:29])[F:28])=[N:4][N:5]([CH2:8][C:9]([N:11]2[CH2:16][CH2:15][CH2:14][C:13]3[N:17]([C:20]4[CH:25]=[CH:24][C:23]([F:26])=[CH:22][CH:21]=4)[N:18]=[CH:19][C:12]2=3)=[O:10])[C:6]=1[CH3:7].[H-].[Na+].[CH2:33]=O.CN([CH:38]=[O:39])C>>[Cl:1][C:2]1[C:3]([C:27]([F:30])([F:29])[F:28])=[N:4][N:5]([CH:8]([CH2:33][O:39][CH3:38])[C:9]([N:11]2[CH2:16][CH2:15][CH2:14][C:13]3[N:17]([C:20]4[CH:25]=[CH:24][C:23]([F:26])=[CH:22][CH:21]=4)[N:18]=[CH:19][C:12]2=3)=[O:10])[C:6]=1[CH3:7]

Participants

5

Reactant 4

HCID 712FormaldehydeHCID 6228DimethylformamideHCID 24758Sodium hydrideHCID 733351252-[4-chloro-5-methyl-3-(trifluoromethyl)pyrazol-1-yl]-1-[1-(4-fluorophenyl)-6,7-dihydro-5H-pyrazolo[4,3-b]pyridin-4-yl]ethanone

Product 1

HCID 733359122-[4-chloro-5-methyl-3-(trifluoromethyl)pyrazol-1-yl]-1-[1-(4-fluorophenyl)-6,7-dihydro-5H-pyrazolo[4,3-b]pyridin-4-yl]-3-methoxy-propan-1-oneYield 12%

Procedure

To a mixture of 2-[4-chloro-5-methyl-3-(trifluoromethyl)pyrazol-1-yl]-1-[1-(4-fluorophenyl)-6,7-dihydro-5H-pyrazolo[4,3-b]pyridin-4-yl]ethanone (0.045 g, 0.10 mmol) and NaH (0.030 g, 0.75 mmol, 60% in mineral oil) in DMF (0.8 mL) was added dry paraformaldehyde (0.015 g, 0.50 mmol). The mixture was stirred at rt for 30 min. It was then quenched with water. The mixture was partitioned between EtOAc (50 mL) and brine (30 mL). The organic layer was separated, dried over Na2SO4, concentrated in vacuo, and purified by reverse phase HPLC to afford the desired product (0.006 g, 12%). 1H NMR (400 MHz, CDCl3) δ 8.44 (s, 1H), 7.44 (dd, J=8.8, 4.6 Hz, 2H), 7.16 (dd, J=8.4, 8.4 Hz, 2H), 5.51 (dd, J=8.0, 7.2 Hz, 1H), 4.18 (m, 1H), 4.08 (m, 1H), 3.75 (m, 1H), 3.37 (s, 3H), 3.35 (m, 1H), 2.78 (m, 2H), 2.33 (s, 3H), 2.09 (m, 2H); MS: (ES) m/z calculated for C21H20ClF4N5O2 [M+H]+ 486.1, found 486.1.

Workup

  1. customIt was then quenched with water
  2. customThe mixture was partitioned between EtOAc (50 mL) and brine (30 mL)
  3. customThe organic layer was separated
  4. dry with materialdried over Na2SO4
  5. concentrationconcentrated in vacuo
  6. custompurified by reverse phase HPLC

Sources & evidence

ORD record
ord-74e6cd1ce0694b65a5149ccfd7115a6d
Source dataset
uspto-grants-2015_11
Patent number
US09181241B2

Reaction notes

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