Piperazine → HCID 136121527, compound

HRID 2079252Notes

Reaction equation

HRID 2079252 reaction equation
Cl[C:2]1[C:11]2[C:6](=[CH:7][CH:8]=[C:9]([F:12])[CH:10]=2)[N:5]=[C:4]([C:13]2[CH:18]=[CH:17][CH:16]=[CH:15][C:14]=2[OH:19])[N:3]=1.[NH:20]1[CH2:25][CH2:24][NH:23][CH2:22][CH2:21]1.C(N(CC)CC)C>C(Cl)Cl>[F:12][C:9]1[CH:10]=[C:11]2[C:6](=[CH:7][CH:8]=1)[N:5]=[C:4]([C:13]1[CH:18]=[CH:17][CH:16]=[CH:15][C:14]=1[OH:19])[N:3]=[C:2]2[N:20]1[CH2:25][CH2:24][NH:23][CH2:22][CH2:21]1

Participants

5

Reactant 3

HCID 4837PiperazineHCID 8471TriethylamineHCID 1361214352-(4-Chloro-6-fluoroquinazolin-2-yl)phenol

Product 1

HCID 136121527HCID 136121527, compoundYield 68%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent2×

Procedure

To a stirring solution of 2-(4-chloro-6-fluoroquinazolin-2-yl)phenol (500 mg, 1.82 mmol) in CH2Cl2 (20 mL) at 0° C., under an N2 atmosphere was rapidly added a solution of piperazine (0.263 g, 7.28 mmol) and triethylamine (0.35 mL, 2.55 mmol) in CH2Cl2. The mixture was stirred for 1 h and then quenched with H2O, extracted twice with CH2Cl2, dried over Na2SO4, filtered, and concentrated. Purification via silica gel chromatography using 0-5% MeOH in CH2Cl2 gave 2-(6-fluoro-4-(piperazin-1-yl)quinazolin-2-yl)phenol (400 mg, 68%). LC/MS: m/z 325.5 (M+H)+ at 2.12 min (10%-99% CH3CN (0.035% TFA)/H2O (0.05% TFA)). 1H NMR (400 MHz, DMSO-d6) δ 8.42 (m, 1H), 7.97 (m, 1H), 7.78 (m, 2H), 7.39 (m, 1H), 6.95 (m, 2H), 3.83 (t, J=4.9 Hz, 4H), 2.92 (t, J=4.9 Hz, 4H) ppm.

Workup

  1. customquenched with H2O
  2. extractionextracted twice with CH2Cl2
  3. dry with materialdried over Na2SO4
  4. filtrationfiltered
  5. concentrationconcentrated
  6. customPurification via silica gel chromatography

Sources & evidence

ORD record
ord-154f15f2c0a641e09265eb5679b567ef
Source dataset
uspto-grants-2011_04
Patent number
US07928107B2

Reaction notes

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