Potassium Carbonate → Gsk-239512

HRID 222717Notes

Reaction equation

[CH:1]1([N:5]2[CH2:11][CH2:10][C:9]3[CH:12]=[CH:13][C:14]([O:16][C:17]4[CH:22]=[CH:21][C:20](I)=[CH:19][N:18]=4)=[CH:15][C:8]=3[CH2:7][CH2:6]2)[CH2:4][CH2:3][CH2:2]1.[NH:24]1[CH2:28][CH2:27][CH2:26][C:25]1=[O:29].C(=O)([O-])[O-].[K+].[K+]>[Cu]>[CH:1]1([N:5]2[CH2:11][CH2:10][C:9]3[CH:12]=[CH:13][C:14]([O:16][C:17]4[N:18]=[CH:19][C:20]([N:24]5[CH2:28][CH2:27][CH2:26][C:25]5=[O:29])=[CH:21][CH:22]=4)=[CH:15][C:8]=3[CH2:7][CH2:6]2)[CH2:4][CH2:3][CH2:2]1

Participants

Conditions

Temperature: 150 °C

Procedure

A mixture of 3-cyclobutyl-7-[(5-iodo-2-pyridinyl)oxy]-2,3,4,5-tetrahydro-1H-3-benzazepine (E207) (252 mg, 0.6 mmol), 2-pyrrolidinone (153 mg, 1.8 mmol), potassium carbonate (83 mg, 0.6 mmol), copper powder (126 mg, 1.2 mmol) were heated in a microwave reactor at 150° C. for 1 minute. The reaction mixture was diluted with 2-pyrrolidinone (1 g, 12 mmol) and heated for a further 20 minutes at 200° C. The reaction mixture was cooled and applied to a SCX ion exchange cartridge (Varian bond-elute, 10 g) and washed with methanol and then a mixture of 0.880 ammonia/methanol. The combined basic fractions were concentrated in vacuo and the resulting residue purified by column chromatography eluting with a mixture of 0.880 ammonia:methanol:dichloromethane (1:9:90) to afford the title compound (E217). MS (ES+) m/e 378 [M+H]+.

Workup

temperatureheated for a further 20 minutes at 200° C
temperatureThe reaction mixture was cooled
washwashed with methanol
additiona mixture of 0.880 ammonia/methanol
concentrationThe combined basic fractions were concentrated in vacuo
customthe resulting residue purified by column chromatography
washeluting with a mixture of 0.880 ammonia:methanol:dichloromethane (1:9:90)

Sources & evidence

ORD record: ord-ae39d6c3d6194999970ed8ea1f1eede4
Source dataset: uspto-grants-2012_06
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08207331B2

Reaction notes

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