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Triphosgene → 3-Dibenzylamino-6,7-difluoro-1H-quinazoline-2,4-dione

HRID 10313
Notes
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Reaction equation

HRID 10313 reaction equation
[CH2:1]([N:8]([CH2:21][C:22]1[CH:27]=[CH:26][CH:25]=[CH:24][CH:23]=1)[NH:9][C:10](=[O:20])[C:11]1[CH:16]=[C:15]([F:17])[C:14]([F:18])=[CH:13][C:12]=1[NH2:19])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.Cl[C:29](Cl)([O:31]C(=O)OC(Cl)(Cl)Cl)Cl.C([O-])(O)=O.[Na+]>C(Cl)Cl>[CH2:21]([N:8]([CH2:1][C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1)[N:9]1[C:10](=[O:20])[C:11]2[C:12](=[CH:13][C:14]([F:18])=[C:15]([F:17])[CH:16]=2)[NH:19][C:29]1=[O:31])[C:22]1[CH:27]=[CH:26][CH:25]=[CH:24][CH:23]=1
ParticipantsConditionsProcedureWorkupSources & evidenceReaction notes

Participants

5

Reactant 3

HCID 94429TriphosgeneHCID 516892Sodium BicarbonateHCID 866071322-Amino4,5-difluorobenzoic acid, 2,2-dibenzylhydrazide

Product 1

HCID 219790003-Dibenzylamino-6,7-difluoro-1H-quinazoline-2,4-dioneYield 198.7%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Conditions

Temperature
25 °C

Procedure

2-Amino-4,5-difluorobenzoic acid, 2,2-dibenzylhydrazide (Example 15) (0.81 g, 2.2 mmol) and triphosgene (0.33 g, 1.1 mmol) are combined in 100 mL of methylene chloride and stirred at 25° C. for 20 hours. The solution is poured into 200 mL of saturated NaHCO3, the layers are separated, and the aqueous layer is washed three times with ethyl acetate. The combined organic layers are dried over magnesium sulfate and then concentrated to give 0.86 g of the title compound as a solid. MS CI: m/z 394 (MH+).

Workup

  1. customthe layers are separated
  2. washthe aqueous layer is washed three times with ethyl acetate
  3. dry with materialThe combined organic layers are dried over magnesium sulfate
  4. concentrationconcentrated

Sources & evidence

ORD record
ord-80072c018d95452cb4a32b07e670454c
Source dataset
uspto-grants-2006_08
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US07094780B1

Reaction notes

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On this pageParticipantsConditionsProcedureWorkupSources & evidenceReaction notes