Isoamyl Nitrite → N-{4-[6-(2-Iodo-4-trifluoromethyl-phenyl)-pyrimidin-4-yloxy]-benzothiazol-2-yl}-acetamide

HRID 2055994Notes

Reaction equation

N[C:2]1[CH:7]=[C:6]([C:8]([F:11])([F:10])[F:9])[CH:5]=[CH:4][C:3]=1[C:12]1[N:17]=[CH:16][N:15]=[C:14]([O:18][C:19]2[C:24]3[N:25]=[C:26]([NH:28][C:29](=[O:31])[CH3:30])[S:27][C:23]=3[CH:22]=[CH:21][CH:20]=2)[CH:13]=1.[I-:32].[Cs+].COCCOC.N(OCCC(C)C)=O>CO.[Cu]I>[I:32][C:2]1[CH:7]=[C:6]([C:8]([F:11])([F:10])[F:9])[CH:5]=[CH:4][C:3]=1[C:12]1[N:17]=[CH:16][N:15]=[C:14]([O:18][C:19]2[C:24]3[N:25]=[C:26]([NH:28][C:29](=[O:31])[CH3:30])[S:27][C:23]=3[CH:22]=[CH:21][CH:20]=2)[CH:13]=1

Participants

Conditions

Temperature: 65 °C

Procedure

To N-{4-[6-(2-amino-4-trifluoromethyl-phenyl)-pyrimidin-4-yloxy]-benzothiazol-2-yl}-acetamide, (Example 151), (0.25 g, 0.56 mmol) was added CsI (0.15 g, 0.56 mmol, Aldrich), 12 (0.071 g, 0.28 mmol, Aldrich), CuI (0.032 g, 0.17 mmol, Aldrich) and ethylene glycol dimethyl ether (6 mL). To the mixture was added isoamyl nitrite (0.45 mL, 3.4 mmol, Aldrich) and the reaction was stirred for 1 h at room temperature, at 65° C. for 3 h, and then at room temperature for 18 h. The reaction mixture was diluted with MeOH (2 M in NH3) and concentrated. The residue was taken up in MeOH and concentrated onto silica gel. Purification by silica gel chromatography (gradient, 0.4 to 1.3% MeOH (2 M in NH3)/CH2Cl2) afforded the title compound as a white solid. Mp: 242-243° C. MS (ESI, pos. ion) m/z: 557.0 (M+1).

Workup

waitat room temperature for 18 h
concentrationconcentrated
concentrationconcentrated onto silica gel
customPurification by silica gel chromatography (gradient, 0.4 to 1.3% MeOH (2 M in NH3)/CH2Cl2)

Sources & evidence

ORD record: ord-b3b924d254584033ae34a5789b7725e0
Source dataset: uspto-grants-2008_02
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07332511B2

Reaction notes

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