Acetic Acid → 3-[[[3-(1,1,2,2-Tetrafluoroethoxy)phenyl]methyl]amino]phenol

HRID 990506Notes

Reaction equation

HRID 990506 reaction equation
[NH2:1][C:2]1[CH:3]=[C:4]([OH:8])[CH:5]=[CH:6][CH:7]=1.[F:9][C:10]([F:23])([O:14][C:15]1[CH:16]=[C:17]([CH:20]=[CH:21][CH:22]=1)[CH:18]=O)[CH:11]([F:13])[F:12].C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+].C(O)(=O)C>ClCCCl.O>[F:9][C:10]([F:23])([O:14][C:15]1[CH:16]=[C:17]([CH2:18][NH:1][C:2]2[CH:3]=[C:4]([OH:8])[CH:5]=[CH:6][CH:7]=2)[CH:20]=[CH:21][CH:22]=1)[CH:11]([F:12])[F:13]

Participants

7

Reactant 4

HCID 176Acetic AcidHCID 115683-AminophenolHCID 118803Benzaldehyde, 3-(1,1,2,2-tetrafluoroethoxy)-HCID 5049666Sodium triacetoxyborohydride

Product 1

HCID 109580163-[[[3-(1,1,2,2-Tetrafluoroethoxy)phenyl]methyl]amino]phenolYield 78%

Reagents, catalysts & solvents 2

HCID 111,2-DichloroethaneSolventHCID 962WaterSolvent

Procedure

To a solution of 3-aminophenol (4.91 g, 45.0 mmol) and 3-(1,1,2,2-tetrafluoroethoxy)benzaldehyde (10.0 g, 45.0 mmol) dissolved in 100 mL of 1,2-dichloroethane was added sodium triacetoxyborohydride (14.28 g 67.5 mmol) and glacial acetic acid (2.7 mL, 47.3 mmol). The reaction mixture was stirred for 6 h, water was added, and the mixture was extracted with dichloromethane. The organics were washed with saturated aqueous sodium bicarbonate then dried over MgSO4. The dried organic layer was evaporated to give 11.00 g (78%) of the desired 3-[[[3-(1,1,2,2-tetrafluoroethoxy)phenyl]methyl]amino]phenol product as a dark orange oil. 1H NMR(CDCl3) δ4.32 (s, 2H), 5.88 (tt, 1H), 6.08 (t, 1H), 6.17-6.22 (m, 2H), 7.00 (t, 1H), 7.11 (dd, 1H), 7.24-7.27 (m, 2H), 7.33 (t, 1H).

Workup

  1. extractionthe mixture was extracted with dichloromethane
  2. washThe organics were washed with saturated aqueous sodium bicarbonate
  3. dry with materialthen dried over MgSO4
  4. customThe dried organic layer was evaporated

Sources & evidence

ORD record
ord-26f820672f2347a3a587fecea77dcd28
Source dataset
uspto-grants-2002_10
Patent number
US06458852B1

Reaction notes

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