Triethylamine → (R)-2-hydroxy-1-(4-(2-(2-hydroxyphenyl)quinazolin-4-yl)piperazin-1-yl)-4-methylpentan-1-one

HRID 2079237Notes

Reaction equation

HRID 2079237 reaction equation
[N:1]1([C:7]2[C:16]3[C:11](=[CH:12][CH:13]=[CH:14][CH:15]=3)[N:10]=[C:9]([C:17]3[CH:22]=[CH:21][CH:20]=[CH:19][C:18]=3[OH:23])[N:8]=2)[CH2:6][CH2:5][NH:4][CH2:3][CH2:2]1.C(N(CC)CC)C.[OH:31][C@H:32]([CH2:36][CH:37]([CH3:39])[CH3:38])[C:33](O)=[O:34].CN(C(ON1N=NC2C=CC=NC1=2)=[N+](C)C)C.F[P-](F)(F)(F)(F)F>C(Cl)Cl>[OH:31][C@H:32]([CH2:36][CH:37]([CH3:39])[CH3:38])[C:33]([N:4]1[CH2:3][CH2:2][N:1]([C:7]2[C:16]3[C:11](=[CH:12][CH:13]=[CH:14][CH:15]=3)[N:10]=[C:9]([C:17]3[CH:22]=[CH:21][CH:20]=[CH:19][C:18]=3[OH:23])[N:8]=2)[CH2:6][CH2:5]1)=[O:34]

Participants

6

Reactant 4

HCID 8471TriethylamineHCID 439960(R)-2-hydroxy-4-methylpentanoic acidHCID 9886157Methanaminium, N-((dimethylamino)(3H-1,2,3-triazolo(4,5-b)pyridin-3-yloxy)methylene)-N-methyl-, hexafluorophosphate(1-) (1:1)HCID 1361053622-(4-(Piperazin-1-yl)quinazolin-2-yl)phenol

Product 1

HCID 135525571(R)-2-hydroxy-1-(4-(2-(2-hydroxyphenyl)quinazolin-4-yl)piperazin-1-yl)-4-methylpentan-1-oneYield 77%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

To a solution of 2-(4-(piperazin-1-yl)quinazolin-2-yl)phenol (250 mg, 0.82 mmol) in CH2Cl2 (6 mL) was added triethylamine (227 μL, 1.63 mmol) followed by the addition of (R)-2-hydroxy-4-methylpentanoic acid (140 mg, 1.06 mmol) and HATU (403 mg, 1.06 mmol). The reaction mixture was stirred at room temperature for 3 h and then quenched with H2O. The aqueous layer was extracted twice with CH2Cl2, dried over MgSO4, filtered, and concentrated. Purification via silica gel chromatography using 0-10% EtOAc in 50:50 CH2Cl2:hexanes gave (R)-2-hydroxy-1-(4-(2-(2-hydroxyphenyl)quinazolin-4-yl)piperazin-1-yl)-4-methylpentan-1-one (265 mg, 77%). LC/MS: m/z 421.30 (M+H)+ at 2.57 min (10%-99% CH3CN (0.035% TFA)/H2O (0.05% TFA)). 1H NMR (400 MHz, DMSO-d6) δ 8.47 (dd, J=8.3, 1.7 Hz, 1H), 8.12 (d, J=8.3 Hz, 1H) 7.88 (m, 2H), 7.57 (m, 1H), 7.40 (m, 1H), 6.96 (m, 2H), 4.92 (d, J=7.2 Hz, 1H), 4.39 (m, 1H), 3.95 (m, 4H), 3.76 (m, 4H), 1.80 (m, 1H), 1.43 (m, 2H), 0.92 (q, J=3.8 Hz, 6H).

Workup

  1. customquenched with H2O
  2. extractionThe aqueous layer was extracted twice with CH2Cl2
  3. dry with materialdried over MgSO4
  4. filtrationfiltered
  5. concentrationconcentrated
  6. customPurification via silica gel chromatography

Sources & evidence

ORD record
ord-1696508ce9bb4bfaa0f818c97ca85f5a
Source dataset
uspto-grants-2011_04
Patent number
US07928107B2

Reaction notes

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