Boron tribromide → [2-(4-acetamidophenylsulfanyl)-7-hydroxy-quinazolin-4-yl]-(5-methyl-2H-pyrazol-3-yl)-amine

HRID 1611621Notes

Reaction equation

HRID 1611621 reaction equation
[C:1]([NH:4][C:5]1[CH:10]=[CH:9][C:8]([S:11][C:12]2[N:21]=[C:20]([NH:22][C:23]3[NH:24][N:25]=[C:26]([CH3:28])[CH:27]=3)[C:19]3[C:14](=[CH:15][C:16]([O:29]C)=[CH:17][CH:18]=3)[N:13]=2)=[CH:7][CH:6]=1)(=[O:3])[CH3:2].B(Br)(Br)Br>ClC(Cl)C.ClCCl>[C:1]([NH:4][C:5]1[CH:6]=[CH:7][C:8]([S:11][C:12]2[N:21]=[C:20]([NH:22][C:23]3[NH:24][N:25]=[C:26]([CH3:28])[CH:27]=3)[C:19]3[C:14](=[CH:15][C:16]([OH:29])=[CH:17][CH:18]=3)[N:13]=2)=[CH:9][CH:10]=1)(=[O:3])[CH3:2]

Participants

5

Reactant 2

HCID 25134Boron tribromide2×HCID 178418798HCID 178418798, compound

Product 1

HCID 178418855[2-(4-acetamidophenylsulfanyl)-7-hydroxy-quinazolin-4-yl]-(5-methyl-2H-pyrazol-3-yl)-amine

Reagents, catalysts & solvents 2

HCID 6344DichloromethaneSolvent2×HCID 63651,1-DichloroethaneSolvent

Conditions

Temperature
80 °C

Procedure

A solution of [2-(4-acetamidophenylsulfanyl)-7-methoxy-quinazolin-4-yl]-(5-methyl-2H-pyrazol-3-yl)-amine (23 mg, 5.54.10−5 mol) in dichloroethane (3 mL) is treated with 1M BBr3 in dichloromethane (222 μL, 2.21.10−4 mol). The mixture os heated at 80° C. for 4 hours before 1M BBr3 in DCM (222 μL, 2.21.10−4 mol) is added. The reaction mixture is heated at 80° C. for a further 3 hours. The solvent is evaporated and methanol is added to the residue to quench residual BBr3. The solvent is evaporated in vacuo and this operation repeated 3 times. 1M HCl (2 mL) is added to the solid residue and the suspension stirred at room temperature for 15 hours. The solid is collected by filtration and suspended in a mixture water/EtOH (3/1, 8 mL). The mixture is neutralized with NaHCO3 and stirred for 2 hours at room temperature. The solid is then collected by filtration, rinsed with water and diethyl ether to give the desired [2-(4-acetamidophenylsulfanyl)-7-hydroxy-quinazolin-4-yl]-(5-methyl-2H-pyrazol-3-yl)-amine.

Workup

  1. additionis added
  2. customThe solvent is evaporated
  3. additionmethanol is added to the residue
  4. customto quench residual BBr3
  5. customThe solvent is evaporated in vacuo
  6. addition1M HCl (2 mL) is added to the solid residue
  7. filtrationThe solid is collected by filtration
  8. stirringstirred for 2 hours at room temperature
  9. filtrationThe solid is then collected by filtration
  10. washrinsed with water and diethyl ether

Sources & evidence

ORD record
ord-c8b4efd6a7de41868f0e7ed363015dba
Source dataset
uspto-grants-2006_01
Patent number
US06989385B2

Reaction notes

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