2-Bromoethyl methyl ether → 4-(6-butyl-5-{4-cyclohexyloxy-3-[1-(2-methoxy-ethyl)-1H-pyrazol-4-yl]-phenyl}-pyridazin-3-yloxy)-piperidine-1-carboxylic acid tert-butyl ester

HRID 2168765Notes

Reaction equation

HRID 2168765 reaction equation
[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][CH:11]([O:14][C:15]2[N:16]=[N:17][C:18]([CH2:39][CH2:40][CH2:41][CH3:42])=[C:19]([C:21]3[CH:26]=[CH:25][C:24]([O:27][CH:28]4[CH2:33][CH2:32][CH2:31][CH2:30][CH2:29]4)=[C:23]([C:34]4[CH:35]=[N:36][NH:37][CH:38]=4)[CH:22]=3)[CH:20]=2)[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].CC(C)([O-])C.[K+].Br[CH2:50][CH2:51][O:52][CH3:53]>C1COCC1>[C:1]([O:5][C:6]([N:8]1[CH2:9][CH2:10][CH:11]([O:14][C:15]2[N:16]=[N:17][C:18]([CH2:39][CH2:40][CH2:41][CH3:42])=[C:19]([C:21]3[CH:26]=[CH:25][C:24]([O:27][CH:28]4[CH2:33][CH2:32][CH2:31][CH2:30][CH2:29]4)=[C:23]([C:34]4[CH:38]=[N:37][N:36]([CH2:50][CH2:51][O:52][CH3:53])[CH:35]=4)[CH:22]=3)[CH:20]=2)[CH2:12][CH2:13]1)=[O:7])([CH3:4])([CH3:3])[CH3:2]

Participants

5

Reactant 3

HCID 809722-Bromoethyl methyl ether2×HCID 23665647Potassium tert-butoxide2×HCID 673731874-{6-butyl-5-[4-cyclohexyloxy-3-(1H-pyrazol-4-yl)-phenyl]-pyridazin-3-yloxy}-piperidine-1-carboxylic acid tert-butyl ester

Product 1

HCID 673741544-(6-butyl-5-{4-cyclohexyloxy-3-[1-(2-methoxy-ethyl)-1H-pyrazol-4-yl]-phenyl}-pyridazin-3-yloxy)-piperidine-1-carboxylic acid tert-butyl esterYield 67.1%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

A mixture of 4-{6-butyl-5-[4-cyclohexyloxy-3-(1H-pyrazol-4-yl)-phenyl]-pyridazin-3-yloxy}-piperidine-1-carboxylic acid tert-butyl ester (0.14 mmol, 80.6 mg), potassium tert-butoxide (0.15 mmol, 17.2 mg, 98%) and THF (1 mL) was stirred at room temperature for 40 min. 1-Bromo-2-methoxy-ethane (0.17 mmol, 0.016 mL) was added and it was stirred for 2.5 h. More potassium tert-butoxide (0.30 mmol, 34.4 mg, 98%) was added and after stirring for 30 min, more 1-bromo-2-methoxy-ethane (0.34 mmol, 0.032 mL) was added. It was stirred overnight. The reaction mixture was partitioned between ethyl acetate (10 mL) and saturated aq. sodium bicarbonate solution (10 mL). The ethyl acetate layer was dried over sodium sulfate. Purification by column chromatography on silica gel using 20-100% ethyl acetate in hexanes to provide 4-(6-butyl-5-{4-cyclohexyloxy-3-[1-(2-methoxy-ethyl)-1H-pyrazol-4-yl]-phenyl}-pyridazin-3-yloxy)-piperidine-1-carboxylic acid tert-butyl ester as colorless solid (59.5 mg).

Workup

  1. stirringit was stirred for 2.5 h
  2. stirringafter stirring for 30 min
  3. stirringIt was stirred overnight
  4. customThe reaction mixture was partitioned between ethyl acetate (10 mL) and saturated aq. sodium bicarbonate solution (10 mL)
  5. dry with materialThe ethyl acetate layer was dried over sodium sulfate
  6. customPurification by column chromatography on silica gel using 20-100% ethyl acetate in hexanes

Sources & evidence

ORD record
ord-70f3cd5445974acaa24f8b88e7a9a9da
Source dataset
uspto-grants-2015_06
Patent number
US09045461B2

Reaction notes

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