Potassium Carbonate → {4-[(5-Chloro-3-methyl-pyridin-2-ylmethyl)-amino]-butyl}-cyclopropyl-carbamic acid tert-butyl ester

HRID 1592496Notes

Reaction equation

HRID 1592496 reaction equation
[C:1]([O:5][C:6](=[O:16])[N:7]([CH2:11][CH2:12][CH2:13][CH2:14][NH2:15])[CH:8]1[CH2:10][CH2:9]1)([CH3:4])([CH3:3])[CH3:2].[Cl:17][C:18]1[CH:19]=[C:20]([CH3:26])[C:21]([CH:24]=O)=[N:22][CH:23]=1.C([O-])([O-])=O.[K+].[K+].[BH4-].[Na+].C([O-])(O)=O.[Na+]>CO>[C:1]([O:5][C:6](=[O:16])[N:7]([CH2:11][CH2:12][CH2:13][CH2:14][NH:15][CH2:24][C:21]1[C:20]([CH3:26])=[CH:19][C:18]([Cl:17])=[CH:23][N:22]=1)[CH:8]1[CH2:9][CH2:10]1)([CH3:4])([CH3:2])[CH3:3]

Participants

7

Reactant 5

HCID 11430Potassium CarbonateHCID 516892Sodium BicarbonateHCID 4311764Sodium borohydrideHCID 67271617(4-Amino-butyl)-cyclopropylcarbamic acid tert-butyl esterHCID 722140555-Chloro-3-methylpicolinaldehyde

Product 1

HCID 67272035{4-[(5-Chloro-3-methyl-pyridin-2-ylmethyl)-amino]-butyl}-cyclopropyl-carbamic acid tert-butyl esterYield 44%

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent

Conditions

Temperature
0 °C

Procedure

A mixture of (4-amino-butyl)-cyclopropyl-carbamic acid tert-butyl ester (0.228 g, 1.00 mmol), 5-chloro-3-methyl-pyridine-2-carbaldehyde (0.141 g, 1.00 mmol) and K2CO3 (0.138 g, 1.00) in MeOH (5 mL) was stirred for 16 h. The mixture was filtered through a celite cake and the filtrate was cooled at 0° C. NaBH4 (0.038 g, 1.0 mmol) was added to the filtrate, and the mixture was stirred for 30 min. Saturated aqueous NaHCO3 (20 mL) was added and MeOH was removed. The aqueous residue was extracted with CH2Cl2 (3×30 mL). The organic extracts were combined and dried over anhydrous Na2SO4. After filtration the solvent was removed by evaporation under vacuum, and the residue was purified by flash chromatography on a silica gel column (200:10:1 CH2Cl2/MeOH/NH4OH), affording {4-[(5-chloro-3-methyl-pyridin-2-ylmethyl)-amino]-butyl}-cyclopropyl-carbamic acid tert-butyl ester as a pale yellow oil (0.155 g, 44%). 1H NMR (CDCl3) δ 0.54-0.59 (m, 2H), 0.69-0.75 (m, 2H), 1.45 (s, 9H), 1.54-1.61 (m, 4H), 2.30 (s, 3H), 2.45-2.50 (m, 1H), 2.69-2.74 (m, 2H), 3.18-3.23 (m, 2H), 3.85 (s, 2H), 7.43 (s, 1H), 8.34 (s, 1H).

Workup

  1. filtrationThe mixture was filtered through a celite cake
  2. stirringthe mixture was stirred for 30 min
  3. customMeOH was removed
  4. extractionThe aqueous residue was extracted with CH2Cl2 (3×30 mL)
  5. dry with materialdried over anhydrous Na2SO4
  6. filtrationAfter filtration the solvent
  7. customwas removed by evaporation under vacuum
  8. customthe residue was purified by flash chromatography on a silica gel column (200:10:1 CH2Cl2/MeOH/NH4OH)

Sources & evidence

ORD record
ord-a09cc1845bcb438abd2ee167e8bd10e7
Source dataset
uspto-grants-2007_11
Patent number
US07291631B2

Reaction notes

Loading…