Cesium carbonate → Ethyl 2-(2-(3-Cyano-5-(trifluoromethoxy)benzyloxy)-6,7,8,9-tetrahydropyrido[1,2-a]indol-9-yl)acetate

HRID 515748Notes

Reaction equation

HRID 515748 reaction equation
[OH:1][C:2]1[CH:3]=[C:4]2[C:8](=[CH:9][CH:10]=1)[N:7]1[CH2:11][CH2:12][CH2:13][CH:14]([CH2:15][C:16]([O:18][CH2:19][CH3:20])=[O:17])[C:6]1=[CH:5]2.C(=O)([O-])[O-].[Cs+].[Cs+].Cl[CH2:28][C:29]1[CH:30]=[C:31]([CH:34]=[C:35]([O:37][C:38]([F:41])([F:40])[F:39])[CH:36]=1)[C:32]#[N:33]>CN(C=O)C>[C:32]([C:31]1[CH:30]=[C:29]([CH:36]=[C:35]([O:37][C:38]([F:39])([F:41])[F:40])[CH:34]=1)[CH2:28][O:1][C:2]1[CH:3]=[C:4]2[C:8](=[CH:9][CH:10]=1)[N:7]1[CH2:11][CH2:12][CH2:13][CH:14]([CH2:15][C:16]([O:18][CH2:19][CH3:20])=[O:17])[C:6]1=[CH:5]2)#[N:33]

Participants

5

Reactant 3

HCID 10796Cesium carbonateHCID 668477373-(Chloromethyl)-5-(trifluoromethoxy)benzonitrileHCID 67249257Ethyl 2-(2-hydroxy-6,7,8,9-tetrahydropyrido[1,2-a]indol-9-yl)acetate

Product 1

HCID 67248872Ethyl 2-(2-(3-Cyano-5-(trifluoromethoxy)benzyloxy)-6,7,8,9-tetrahydropyrido[1,2-a]indol-9-yl)acetateYield 83.4%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Conditions

Temperature
75 °C

Procedure

To a mixture of ethyl 2-(2-hydroxy-6,7,8,9-tetrahydropyrido[1,2-a]indol-9-yl)acetate (75 mg, 0.274 mmol) and cesium carbonate (134 mg, 0.412 mmol) in DMF (2 mL) was added 3-(chloromethyl)-5-(trifluoromethoxy)benzonitrile (78 mg, 0.329 mmol). The reaction was heated at 75° C. for 15 h and cooled down. The solid was filtered and washed with ethyl acetate. The combined solvent was evaporated, and the residue was purified by silica gel column chromatography to give the title compound (108 mg). LCMS m/z=473.6 [M+H]+; 1H NMR (400 MHz, CDCl3) δ ppm 1.30 (t, J=7.1 Hz, 3H), 1.51-1.62 (m, 1H), 2.00-2.10 (m, 1H), 2.10-2.24 (m, 2H), 2.55 (dd, J=15.6, 8.6 Hz, 1H), 2.93 (dd, J=15.6, 5.5 Hz, 1H), 3.45-3.54 (m, 1H), 3.85-3.93 (m, 1H), 4.10-4.17 (m, 1H), 4.22 (q, J=7.1 Hz, 2H), 5.14 (s, 2H), 6.18 (s, 1H), 6.87 (dd, J=8.8, 2.4 Hz, 1H), 7.05 (d, J=2.4 Hz, 1H), 7.18 (d, J=8.8 Hz, 1H), 7.44 (s, 1H), 7.58 (s, 1H), 7.71 (s, 1H).

Workup

  1. temperaturecooled down
  2. filtrationThe solid was filtered
  3. washwashed with ethyl acetate
  4. customThe combined solvent was evaporated
  5. customthe residue was purified by silica gel column chromatography

Sources & evidence

ORD record
ord-ffdba2288be44317aa865faf1d4b6e03
Source dataset
uspto-grants-2015_08
Patent number
US09108969B2

Reaction notes

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