Acetic Acid → Tert-butyl 4-{[5-(2-chlorophenyl)-1-(2,6-dichlorophenyl)-2-oxo-1,2,3,4-tetrahydroquinazolin-7-yl]methyl}-3-methylpiperazine-1-carboxylate

HRID 394098Notes

Reaction equation

HRID 394098 reaction equation
[Cl:1][C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][C:3]=1[C:8]1[CH:17]=[C:16]([CH:18]=O)[CH:15]=[C:14]2[C:9]=1[CH2:10][NH:11][C:12](=[O:28])[N:13]2[C:20]1[C:25]([Cl:26])=[CH:24][CH:23]=[CH:22][C:21]=1[Cl:27].[C:29]([N:36]1[CH2:41][CH2:40][NH:39][CH:38]([CH3:42])[CH2:37]1)([O:31][C:32]([CH3:35])([CH3:34])[CH3:33])=[O:30].C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+].C(O)(=O)C>ClC(Cl)C>[Cl:1][C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][C:3]=1[C:8]1[CH:17]=[C:16]([CH2:18][N:39]2[CH2:40][CH2:41][N:36]([C:29]([O:31][C:32]([CH3:35])([CH3:34])[CH3:33])=[O:30])[CH2:37][CH:38]2[CH3:42])[CH:15]=[C:14]2[C:9]=1[CH2:10][NH:11][C:12](=[O:28])[N:13]2[C:20]1[C:21]([Cl:27])=[CH:22][CH:23]=[CH:24][C:25]=1[Cl:26]

Participants

6

Reactant 4

HCID 176Acetic AcidHCID 2756810tert-Butyl 3-methylpiperazine-1-carboxylateHCID 5049666Sodium triacetoxyborohydrideHCID 226481625-(2-Chlorophenyl)-1-(2,6-dichlorophenyl)-2-oxo-1,2,3,4-tetrahydroquinazoline-7-carbaldehyde

Product 1

HCID 22648157Tert-butyl 4-{[5-(2-chlorophenyl)-1-(2,6-dichlorophenyl)-2-oxo-1,2,3,4-tetrahydroquinazolin-7-yl]methyl}-3-methylpiperazine-1-carboxylate

Reagents, catalysts & solvents 1

HCID 63651,1-DichloroethaneSolvent

Procedure

A solution of 5-(2-chlorophenyl)-1-(2,6-dichlorophenyl)-2-oxo-1,2,3,4-tetrahydroquinazoline-7-carbaldehyde (Intermediate AAA1, 208 mg, 0.48 mmol) and 1-BOC-3-methylpiperazine (96 mg, 0.48 mmol) in dichloroethane (5 mL) was stirred at rt for 30 min. To this was added sodium triacetoxyborohydride (150 mg, 0.67 mmol) followed by acetic acid (29 mg, 0.48 mmol). The resulting reaction mixture was stirred at rt for 20 h. The reaction was quenched with 2N NaOH solution (6 mL) followed by extraction with ethyl acetate (100 mL×2). The organic layer was washed with brine and dried over anhydrous sodium sulfate. Removal of the solvent and subsequent purification by flash chromatography using 25% acetone/hexane provided tert-butyl 4-{[5-(2-chlorophenyl)-1-(2,6-dichlorophenyl)-2-oxo-1,2,3,4-tetrahydroquinazolin-7-yl]methyl}-3-methylpiperazine-1-carboxylate as a white solid. 1H NMR (CDCl3, 500 MHz): δ 0.98 (s, 3H), 1.46 (s, 9H), 2.06 (brs, 1H), 2.39 (brs, 1H), 2.60 (brs, 1H), 2.82 (brs, 1H), 3.05 (brs, 1H), 3.15 (m, 1H), 3.54 (brs, 2H), 3.82 (brs, 1H), 4.34 (abq, 2H, J=14.2 Hz), 5.15 (s, 1H), 6.16 (d, 1H, J=5.2 Hz), 6.88 (s, 1H), 7.20-7.60 (m, 7H). MS (API-ES+): 617 (M+H).

Workup

  1. customThe resulting reaction mixture
  2. customThe reaction was quenched with 2N NaOH solution (6 mL)
  3. extractionfollowed by extraction with ethyl acetate (100 mL×2)
  4. washThe organic layer was washed with brine
  5. dry with materialdried over anhydrous sodium sulfate
  6. customRemoval of the solvent and subsequent purification by flash chromatography

Sources & evidence

ORD record
ord-7ca12ece37684cebaba1c0bccb197c4b
Source dataset
uspto-grants-2004_10
Patent number
US06809199B2

Reaction notes

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