Cesium carbonate → Dimethyl 6-[(3-cyclobutyl-2,3,4,5-tetrahydro-1H-3-benzazepin-7-yl)oxy]-2,3-pyridinedicarboxylate

HRID 222728Notes

Reaction equation

[CH:1]1([N:5]2[CH2:11][CH2:10][C:9]3[CH:12]=[C:13]([OH:16])[CH:14]=[CH:15][C:8]=3[CH2:7][CH2:6]2)[CH2:4][CH2:3][CH2:2]1.Cl[C:18]1[N:23]=[C:22]([C:24]([O:26][CH3:27])=[O:25])[C:21]([C:28]([O:30][CH3:31])=[O:29])=[CH:20][CH:19]=1.C(=O)([O-])[O-].[Cs+].[Cs+]>CN(C=O)C>[CH:1]1([N:5]2[CH2:6][CH2:7][C:8]3[CH:15]=[CH:14][C:13]([O:16][C:18]4[N:23]=[C:22]([C:24]([O:26][CH3:27])=[O:25])[C:21]([C:28]([O:30][CH3:31])=[O:29])=[CH:20][CH:19]=4)=[CH:12][C:9]=3[CH2:10][CH2:11]2)[CH2:4][CH2:3][CH2:2]1

Participants

Conditions

Temperature: 80 °C

Procedure

A mixture of 3-cyclobutyl-2,3,4,5-tetrahydro-1H-benzo[d]azepin-7-ol (E3) (1.5 g), dimethyl 6-chloro-2,3-pyridinedicarboxylate (1.58 g; Kenji Niiyama et al. Bioorg. Med. Chem. Lett. 12, 21, 2002, 3041-3054) and cesium carbonate (4.4 g) in dry DMF (30 ml) was heated at 80° C. for 3 h. The cooled mixture was partitioned between water (20 ml) and ethyl acetate (3×100 ml), the combined organic extracts were washed with brine (2×100 ml) and dried (Na2SO4). The solvent was evaporated to give an oil which was purified by column chromatography eluting with a mixture of 0.880 ammonia:methanol:dichloromethane (0.5:4.5:95) to afford the title compound (E231); MS (ES+) m/e 411 [M+H]+.

Workup

customThe cooled mixture was partitioned between water (20 ml) and ethyl acetate (3×100 ml)
washthe combined organic extracts were washed with brine (2×100 ml)
dry with materialdried (Na2SO4)
customThe solvent was evaporated
customto give an oil which
customwas purified by column chromatography
washeluting with a mixture of 0.880 ammonia:methanol:dichloromethane (0.5:4.5:95)

Sources & evidence

ORD record: ord-abd1f5e57980429aafe8979f398ae687
Source dataset: uspto-grants-2012_06
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08207331B2

Reaction notes

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