Cesium carbonate → tert-butyl (1-{[2-amino-3-(aminocarbonyl)-9H-pyrido[2,3-b]indol-9-yl]methyl}cyclopropyl)carbamate

HRID 421647

Reaction equation

HRID 421647 reaction equation
[NH2:1][C:2]1[C:3]([C:15]([NH2:17])=[O:16])=[CH:4][C:5]2[C:13]3[C:8](=[CH:9][CH:10]=[CH:11][CH:12]=3)[NH:7][C:6]=2[N:14]=1.C(=O)([O-])[O-].[Cs+].[Cs+].[C:24]([O:28][C:29](=[O:36])[NH:30][C:31]1([CH2:34]I)[CH2:33][CH2:32]1)([CH3:27])([CH3:26])[CH3:25]>CN(C)C=O.C(OCC)(=O)C>[NH2:1][C:2]1[C:3]([C:15]([NH2:17])=[O:16])=[CH:4][C:5]2[C:13]3[C:8](=[CH:9][CH:10]=[CH:11][CH:12]=3)[N:7]([CH2:34][C:31]3([NH:30][C:29](=[O:36])[O:28][C:24]([CH3:27])([CH3:26])[CH3:25])[CH2:32][CH2:33]3)[C:6]=2[N:14]=1

Participants

6

Reactant 3

HCID 10796Cesium carbonateHCID 152709842-amino-9H-pyrido[2,3-b]indole-3-carboxamideHCID 86648312HCID 86648312, compound

Product 1

HCID 24901061tert-butyl (1-{[2-amino-3-(aminocarbonyl)-9H-pyrido[2,3-b]indol-9-yl]methyl}cyclopropyl)carbamateYield 13%

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 8857Ethyl AcetateSolvent

Conditions

Temperature
100 °C

Procedure

To a stirred solution of 2-amino-9H-pyrido[2,3-b]indole-3-carboxamide (5, 318 mg, 1.41 mmol) in N,N-dimethylformamide (17 mL) was added powdered cesium carbonate (2.29 g, 7.03 mmol), tert-butyl[1-(iodomethyl)cyclopropyl]carbamate (2.26 g, 7.61 mmol, prepared from the corresponding alcohol (J. Med. Chem. 1988, 31, 1694-7) following the procedure detailed in the preparation of xxvii below) was added. The mixture was heated at 100° C. under nitrogen for 2 h. The reaction was cooled to room temperature, diluted with ethyl acetate (150 mL) and washed thrice with water and twice with brine. The extracts were dried over magnesium sulfate, filtered and concentrated. The crude product was purified by silica gel chromatography (95/5 methylene chloride/methanol to 93/7 methylene chloride/methanol gradient) to afford the titled product (63, 75 mg, 13%). NH4OAc Standard conditions. DAD Retention time=7.29 min. M+H=396. 1H NMR (300 MHz, DMSO-d6): δ 8.72 (s, 1H), 7.79 (d, J=7.3 Hz, 1H), 7.54-7.41 (m, 2H), 7.26 (dd, J=7.3 Hz, 1H), 7.20-7.11 (m, 2H), 4.34 (s, 2H), 1.35 (s, 9H), 1.18-1.05 (m, 2H), 0.65-0.54 (m, 2H).

Workup

  1. additionwas added
  2. temperatureThe reaction was cooled to room temperature
  3. washwashed thrice with water
  4. dry with materialThe extracts were dried over magnesium sulfate
  5. filtrationfiltered
  6. concentrationconcentrated
  7. customThe crude product was purified by silica gel chromatography (95/5 methylene chloride/methanol to 93/7 methylene chloride/methanol gradient)

Sources & evidence

ORD record
ord-c0eb4ad0e417420dbbab220e88891e33
Source dataset
uspto-grants-2012_01
Patent number
US08101604B2

Linked notes

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