Boron tribromide → N-Trifluoroacetyl-8-bromo-7-hydroxy-1-isopropyl-2,3,4,5-tetrahydro-1H-3-benzazepine

HRID 221271Notes

Reaction equation

HRID 221271 reaction equation
[F:1][C:2]([F:23])([F:22])[C:3]([N:5]1[CH2:11][CH:10]([CH:12]([CH3:14])[CH3:13])[C:9]2[CH:15]=[C:16]([Br:21])[C:17]([O:19]C)=[CH:18][C:8]=2[CH2:7][CH2:6]1)=[O:4].B(Br)(Br)Br>ClCCl>[F:23][C:2]([F:1])([F:22])[C:3]([N:5]1[CH2:11][CH:10]([CH:12]([CH3:14])[CH3:13])[C:9]2[CH:15]=[C:16]([Br:21])[C:17]([OH:19])=[CH:18][C:8]=2[CH2:7][CH2:6]1)=[O:4]

Participants

4

Reactant 2

HCID 25134Boron tribromideHCID 22292805N-trifluoroacetyl-8-bromo-1-isopropyl-7-methoxy-2,3,4,5-tetrahydro-1H-3-benzazepine

Product 1

HCID 22292823N-Trifluoroacetyl-8-bromo-7-hydroxy-1-isopropyl-2,3,4,5-tetrahydro-1H-3-benzazepineYield 97.3%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

A solution of N-trifluoroacetyl-8-bromo-1-isopropyl-7-methoxy-2,3,4,5-tetrahydro-1H-3-benzazepine (0.041 g, 0.10 mmol) in dichloromethane (1 mL) was treated with BBr3 (0.32 ml, 1.0 M solution in CH2Cl2) and stirred overnight at 20 C. The excess BBr3 is quenched with water and the resulting mixture diluted with ether (50 mL), washed twice with saturated aqueous Na2CO3 (20 mL) and concentrated. Flash chromatography (20% EtOAc in hexanes, silica) resulted in 0.037 g clear oil. MS calculated for C15H17BrF3NO2+H: 380, observed: 380.

Workup

  1. customThe excess BBr3 is quenched with water
  2. additionthe resulting mixture diluted with ether (50 mL)
  3. washwashed twice with saturated aqueous Na2CO3 (20 mL)
  4. concentrationconcentrated

Sources & evidence

ORD record
ord-60bbba5ffbcf41e1aafa00b6a5dd4aad
Source dataset
uspto-grants-2012_06
Patent number
US08207158B2

Reaction notes

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