Potassium Iodide → HCID 67098505, compound

HRID 2078721Notes

Reaction equation

[C:1]([O:5][C:6]([N:8]1[C:16]2[C:11](=[CH:12][CH:13]=[C:14]([O:17][CH2:18][CH2:19][CH2:20]Br)[CH:15]=2)[CH:10]=[C:9]1[C:22]1[C:23]2[S:36][C:35]([C:37]3[CH:42]=[CH:41][CH:40]=[CH:39][CH:38]=3)=[CH:34][C:24]=2[N:25]([C:27]([O:29][C:30]([CH3:33])([CH3:32])[CH3:31])=[O:28])[N:26]=1)=[O:7])([CH3:4])([CH3:3])[CH3:2].[OH:43][CH:44]1[CH2:49][CH2:48][CH2:47][NH:46][CH2:45]1.C(=O)([O-])[O-].[K+].[K+].[I-].[K+]>C(#N)C>[C:1]([O:5][C:6]([N:8]1[C:16]2[C:11](=[CH:12][CH:13]=[C:14]([O:17][CH2:18][CH2:19][CH2:20][N:46]3[CH2:47][CH2:48][CH2:49][CH:44]([OH:43])[CH2:45]3)[CH:15]=2)[CH:10]=[C:9]1[C:22]1[C:23]2[S:36][C:35]([C:37]3[CH:42]=[CH:41][CH:40]=[CH:39][CH:38]=3)=[CH:34][C:24]=2[N:25]([C:27]([O:29][C:30]([CH3:33])([CH3:32])[CH3:31])=[O:28])[N:26]=1)=[O:7])([CH3:4])([CH3:3])[CH3:2]

Participants

Conditions

Temperature: 70 °C

Procedure

A mixture of 6-(3-bromo-propoxy)-2-(1-tert-butoxycarbonyl-5-phenyl-1H-thieno[3,2-c]pyrazol-3-yl)-indole-1-carboxylic acid tert-butyl ester [300 mg, 0.460 mmol, Intermediate (50)], 3-hydroxypiperidine (73.0 mg, 0.722 mmol), potassium carbonate (191 mg, 1.38 mmol), potassium iodide (39.0 mg, 0.235 mmol), and anhydrous acetonitrile (5 mL) was heated at 70° C. with shaking at 200 rpm. After 20 hours, the reaction was cooled to ambient temperature, filtered, the insolubles washed with dichloromethane/methanol (5:1), and the filtrate concentrated under reduced pressure to give a dark residue. The residue was chromatographed on silica, eluting with 20% methanol/dichloromethane (20 mL) followed by 1 M ammonia in methanol/dichloromethane 1:9 (30 mL), to give 2-(1-tert-butoxycarbonyl-5-phenyl-1H-thieno[3,2-c]pyrazol-3-yl)-6-[3-(3-hydroxy-piperidin-1-yl)-propoxy]-indole-1-carboxylic acid tert-butyl ester (329 mg) as a brittle green foam. LC/MS: 673.3 (M+H), 74% UV purity). To a solution of 2-(1-tert-butoxycarbonyl-5-phenyl-1H-thieno[3,2-c]pyrazol-3-yl)-6-[3-(3-hydroxy-piperidin-1-yl)-propoxy]-indole-1-carboxylic acid tert-butyl ester (326 mg), anisole (1.0 mL), and dichloromethane (1.0 mL) at ambient temperature was added trifluoroacetic acid (1.0 mL) and the resulting amber solution heated at 45° C. After 2 hours, the reaction was cooled to ambient temperature and added to a Varian Mega Bond Elut SCX column (5 g) that was conditioned with methanol. The product was washed with methanol (30 mL) and eluted with a 1 M ammonia in methanol solution. Fractions with product were combined and concentrated under reduced pressure to give a white solid. Trituration of the solid with methanol/ether (1:4) provided 1-{3-[2-(5-phenyl-1H-thieno[3,2-c]pyrazol-3-yl)-1H-indol-6-yloxy]-propyl}-piperidin-3-ol [163 mg, 75%, Example 56] as an off-white powder. TLC Rf 0.55 (silica, 20% 1 M NH3 in methanol/80% dichloromethane); mp: 213-216° C.; LC/MS: 473.2 (M+H), RT=2.67 minutes; 1H NMR [300 Mhz, (CD3)2SO]: δ 13.31 (br s 1H), 11.39 (br s, 1H), 7.79 (m, 2H), 7.66 (s, 1H), 7.51-7.36 (m, 4H), 6.93 (d, J=2 Hz, 1H), 6.67 (dd, J=2, 8.5 Hz, 1H), 6.60 (d, J=1.5 Hz, 1H), 4.58 (d, J=5 Hz, 1H), 3.99 (t, J=6.5 Hz, 2H), 3.47 (m, 1H), 2.85 (dm, J=11 Hz, 1H), 2.68 (dm, J=11 Hz, 1H), 2.45 (m, 2H), 1.95-1.67 (m, 5H), 1.62 (dm, J=13.5 Hz, 1H), 1.40 (m, 1H), 1.07 (m, 1H).

Workup

temperaturethe reaction was cooled to ambient temperature
filtrationfiltered
washthe insolubles washed with dichloromethane/methanol (5:1)
concentrationthe filtrate concentrated under reduced pressure
customto give a dark residue
customThe residue was chromatographed on silica
washeluting with 20% methanol/dichloromethane (20 mL)

Sources & evidence

ORD record: ord-e3785724df4b4dbfadc076f649a4a102
Source dataset: uspto-grants-2011_04
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07928231B2

Reaction notes

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