Dimethylaminotri-n-butyltin → (+/-)-tert-Butyl 4-((1-(5-dimethylamino-2-((2-(trimethylsilyl)ethoxy)methyl)-2H-indazol-7-yl)ethoxy)methyl)-4-(4-fluorophenyl)piperidine-1-carboxylate

HRID 913855

Reaction equation

HRID 913855 reaction equation
Br[C:2]1[CH:10]=[C:9]([CH:11]([O:13][CH2:14][C:15]2([C:28]3[CH:33]=[CH:32][C:31]([F:34])=[CH:30][CH:29]=3)[CH2:20][CH2:19][N:18]([C:21]([O:23][C:24]([CH3:27])([CH3:26])[CH3:25])=[O:22])[CH2:17][CH2:16]2)[CH3:12])[C:8]2[C:4](=[CH:5][N:6]([CH2:35][O:36][CH2:37][CH2:38][Si:39]([CH3:42])([CH3:41])[CH3:40])[N:7]=2)[CH:3]=1.[CH3:43][N:44]([Sn](CCCC)(CCCC)CCCC)[CH3:45]>C1(C)C=CC=CC=1.CC1C(P(C2C(C)=CC=CC=2)C2C(C)=CC=CC=2)=CC=CC=1.CC1C(P(C2C(C)=CC=CC=2)C2C(C)=CC=CC=2)=CC=CC=1.Cl[Pd]Cl>[CH3:43][N:44]([CH3:45])[C:2]1[CH:10]=[C:9]([CH:11]([O:13][CH2:14][C:15]2([C:28]3[CH:33]=[CH:32][C:31]([F:34])=[CH:30][CH:29]=3)[CH2:20][CH2:19][N:18]([C:21]([O:23][C:24]([CH3:27])([CH3:26])[CH3:25])=[O:22])[CH2:17][CH2:16]2)[CH3:12])[C:8]2[C:4](=[CH:5][N:6]([CH2:35][O:36][CH2:37][CH2:38][Si:39]([CH3:42])([CH3:41])[CH3:40])[N:7]=2)[CH:3]=1

Participants

5

Reactant 2

HCID 11034994Dimethylaminotri-n-butyltinHCID 57546111(+/-)-tert-Butyl 4-((1-(5-bromo-2-((2-(trimethylsilyl)ethoxy)methyl)-2H-indazol-7-yl)ethoxy)methyl)-4-(4-fluorophenyl)piperidine-1-carboxylate

Product 1

HCID 57546051(+/-)-tert-Butyl 4-((1-(5-dimethylamino-2-((2-(trimethylsilyl)ethoxy)methyl)-2H-indazol-7-yl)ethoxy)methyl)-4-(4-fluorophenyl)piperidine-1-carboxylate

Reagents, catalysts & solvents 2

HCID 10876480Bis(tri-o-tolylphosphine)palladium(II) DichlorideCatalystHCID 1140TolueneSolvent

Conditions

Temperature
120 °C

Procedure

(±)-tert-Butyl 4-((1-(5-bromo-2-((2-(trimethylsilyl)ethoxy)methyl)-2H-indazol-7-yl)ethoxy)methyl)-4-(4-fluorophenyl)piperidine-1-carboxylate (150 mg, 0.226 mmol), trans-dichlorobis(tri-o-tolylphosphine)palladium (II) (17.79 mg, 0.023 mmol), and dimethylaminotri-n-butyltin (0.28 mL, 0.905 mmol) were combined in toluene (1.5 mL) in a microwave tube and sealed. After flushing the mixture with nitrogen, the mixture was heated at 120° C. for 1 h via microwave. After cooling to room temperature, the reaction mixture was concentrated, dissolved in ethyl acetate, washed with water and brine, concentrated and purified by flash chromatography on silica gel (15-30% EtOAc/Hex) to afford 115 mg (80.8%) as yellow oil. 1H-NMR (CDCl3, 500 MHz) δ 7.81 (s, 1H), 7.30 (m, 2H), 6.97 (m, 2H), 6.84 (s, 1H), 5.54 (s, 1H), 5.59 (m, 2H), 4.94 (q, J=5 Hz, 1H), 3.6-3.75 (m, 2H), 3.54 (m, 2H), 3.43 (d, J=10 Hz, 1H), 3.31 (d, J=10 Hz, 2H), 3.00-3.10 (m, 2H), 2.81 (s, 6H), 2.03-2.12 (m, 2H), 1.85-1.95 (m, 2H), 1.43 (d, J=10 Hz, 3H), 1.41 (s, 9H), 0.85-0.90 (m, 2H), −0.09 (s, 9H); 13C-NMR (CDCl3, 126 MHz) δ 171.1, 161.3 (d, J=975 Hz), 155.0, 147.0, 143.4, 139.2, 134.1, 128.9, 123.5, 120.9, 115.4, 115.1, 114.9, 97.2, 81.5, 79.3, 74.4, 67.0, 60.4, 41.9, 41.2, 32.3, 28.5, 27.9, 26.9, 23.1, 21.1, 17.8, 17.6, 14.3, 13.7, −1.36; Mass spec.: 627.60(MH)+.

Workup

  1. customsealed
  2. customAfter flushing the mixture with nitrogen
  3. temperatureAfter cooling to room temperature
  4. concentrationthe reaction mixture was concentrated
  5. dissolutiondissolved in ethyl acetate
  6. washwashed with water and brine
  7. concentrationconcentrated
  8. custompurified by flash chromatography on silica gel (15-30% EtOAc/Hex)
  9. customto afford 115 mg (80.8%) as yellow oil

Sources & evidence

ORD record
ord-f89aedaecfb1420999aec5d4c27f3a8f
Source dataset
uspto-grants-2011_09
Patent number
US08026257B2

Linked notes

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