Cesium carbonate → HCID 59513640, compound

HRID 1158751Notes

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+].I[CH:25]1[CH2:28][N:27]([C:29]([O:31][C:32]([CH3:35])([CH3:34])[CH3:33])=[O:30])[CH2:26]1>CN(C)C=O>[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]([CH:25]3[CH2:26][N:27]([C:29]([O:31][C:32]([CH3:35])([CH3:34])[CH3:33])=[O:30])[CH2:28]3)[C:6]=2[N:14]=1

Participants

Conditions

Temperature: 150 °C

Procedure

To a stirred solution of 2-amino-9H-pyrido[2,3-b]indole-3-carboxamide (5, 44 mg, 0.19 mmol) in N,N-dimethylformamide (4.4 mL) was added powdered cesium carbonate (130 mg, 0.39 mmol), and tert-butyl 3-iodoazetidine-1-carboxylate (Harris, L. J., et al. European Patent Application 1176142, 2002; 0.11 g, 0.39 mmol). The mixture was heated in a microwave at 150° C. for 30 min, concentrated and purified by silica gel chromatography (12 g silica, methylene chloride to 90/10 methylene chloride/methanol gradient) to yield tert-butyl 3-[2-amino-3-(aminocarbonyl)-9H-pyrido[2,3-b]indol-9-yl]azetidine-1-carboxylate (xvi-f, 50 mg, 70%). NH4OAc QC conditions. M+H=382. 1H NMR (300 MHz, CDCl3): δ 8.24 (s, 1H), 7.83 (d, J=7.9 Hz, 1H), 7.60 (d, J=7.9 Hz, 1H), 7.42-7.34 (m, 1H), 7.30-7.22 (m, 1H), 4.75-4.60 (m, 1H), 4.48-4.39 (m, 2H), 4.17-4.07 (m, 2H), 1.51 (s, 9H).

Workup

concentrationconcentrated
custompurified by silica gel chromatography (12 g silica, methylene chloride to 90/10 methylene chloride/methanol gradient)

Sources & evidence

ORD record: ord-15204a98b1af4166b4f01f45ac76b252
Source dataset: uspto-grants-2010_10
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07812018B2

Reaction notes

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