Triethylamine → 2-(4-Bromo-2,6-difluorophenyl)-2-(4-ethyl-3-oxo-1-oxa-4,9-diazaspiro[5.5]undecan-9-yl)acetamide

HRID 1525934Notes

Reaction equation

HRID 1525934 reaction equation
[Br:1][C:2]1[CH:7]=[C:6]([F:8])[C:5]([CH:9](O)[C:10]([NH2:12])=[O:11])=[C:4]([F:14])[CH:3]=1.C(N(CC)CC)C.CS(Cl)(=O)=O.S([O-])(=O)(=O)C.Cl.[CH2:33]([N:35]1[CH2:40][C:39]2([CH2:45][CH2:44][NH:43][CH2:42][CH2:41]2)[O:38][CH2:37][C:36]1=[O:46])[CH3:34]>C(#N)C>[Br:1][C:2]1[CH:7]=[C:6]([F:8])[C:5]([CH:9]([N:43]2[CH2:44][CH2:45][C:39]3([O:38][CH2:37][C:36](=[O:46])[N:35]([CH2:33][CH3:34])[CH2:40]3)[CH2:41][CH2:42]2)[C:10]([NH2:12])=[O:11])=[C:4]([F:14])[CH:3]=1

Participants

7

Reactant 5

HCID 8471Triethylamine2×HCID 31297Methanesulfonyl chlorideHCID 85257MethanesulfonateHCID 712710764-Ethyl-1-oxa-4,9-diazaspiro[5.5]undecan-3-one hydrochlorideHCID 712710952-(4-Bromo-2,6-difluorophenyl)-2-hydroxyacetamide

Product 1

HCID 712708292-(4-Bromo-2,6-difluorophenyl)-2-(4-ethyl-3-oxo-1-oxa-4,9-diazaspiro[5.5]undecan-9-yl)acetamideYield 121.8%

Reagents, catalysts & solvents 1

HCID 6342AcetonitrileSolvent

Conditions

Temperature
40 °C

Procedure

To a solution of 2-(4-bromo-2,6-difluorophenyl)-2-hydroxyacetamide (0.86 g, 3.2 mmol) and triethylamine (1.4 mL, 9.7 mmol) in anhydrous acetonitrile (5 mL) was added neat methanesulfonyl chloride (0.33 mL, 4.2 mmol). The reaction mixture was stirred vigorously at 40° C. for 3 h, at which point the reaction had progressed to completion. To this mesylate intermediate mixture was added more triethylamine (1.4 mL, 9.7 mmol) followed by 4-ethyl-1-oxa-4,9-diazaspiro[5.5]undecan-3-one hydrochloride (0.11 g, 0.48 mmol). The reaction mixture was heated at 90° C. for 3 h until the starting material was consumed. The reaction was diluted with water and was extracted with ether (3×35 mL). The combined ether phases were dried over sodium sulfate, filtered, and evaporated under reduced pressure. Purification of the residue by flash chromatography (65-100% of 10% methanol in dichloromethane:dichloromethane) afforded the title product (261 mg, 18% yield). MS(ES)+ m/e 446 [M+H]+; 1H NMR (400 MHz, CD2Cl2) δ ppm 1.12 (t, J=7.20 Hz, 3 H) 1.64-1.71 (m, 1 H) 1.73 (dd, J=4.17, 2.65 Hz, 1 H) 1.90-1.99 (m, 2 H) 2.19-2.27 (m, 1 H) 2.54-2.66 (m, 1 H) 2.67-2.73 (m, 1 H) 2.75-2.81 (m, 1 H) 3.15 (s, 2 H) 3.41 (q, J=6.91 Hz, 2 H) 3.98 (s, 2 H) 4.69 (s, 1 H) 5.68 (br. s., 1 H) 7.15-7.25 (m, 2 H) 7.36 (br. s., 1 H).

Workup

  1. temperatureThe reaction mixture was heated at 90° C. for 3 h until the starting material
  2. customwas consumed
  3. additionThe reaction was diluted with water
  4. extractionwas extracted with ether (3×35 mL)
  5. dry with materialThe combined ether phases were dried over sodium sulfate
  6. filtrationfiltered
  7. customevaporated under reduced pressure
  8. customPurification of the residue by flash chromatography (65-100% of 10% methanol in dichloromethane:dichloromethane)

Sources & evidence

ORD record
ord-0817fa3046784d9a99f99c62ea48fc7d
Source dataset
uspto-grants-2015_07
Patent number
US09084794B2

Reaction notes

Loading…