Tributylphosphine → 6-Methoxyquinazoline

HRID 2182555Notes

Reaction equation

HRID 2182555 reaction equation
N(C(N1CCCCC1)=O)=NC(N1CCCCC1)=O.O[C:20]1[CH:29]=[C:28]2[C:23]([CH:24]=[N:25][CH:26]=[N:27]2)=[CH:22][C:21]=1[O:30][CH3:31].C(P(CCCC)CCCC)CCC.O=S1(=O)CCNCC1>C(Cl)Cl.CCOCC>[CH3:31][O:30][C:21]1[CH:22]=[C:23]2[C:28](=[CH:29][CH:20]=1)[N:27]=[CH:26][N:25]=[CH:24]2

Participants

7

Reactant 4

HCID 13831TributylphosphineHCID 730421,1'-(Azodicarbonyl)dipiperidineHCID 6484228Thiomorpholine 1,1-dioxideHCID 1360078727-Hydroxy-6-methoxyquinazoline

Product 1

HCID 131268876-MethoxyquinazolineYield 36%

Reagents, catalysts & solvents 2

HCID 3283Diethyl EtherSolventHCID 6344DichloromethaneSolvent

Procedure

1,1′-(Azodicabonyl)dipiperidine (525 mg, 2.1 mmol) was added in portions to a mixture of 44-chloro-2-fluoroanilino)-7-hydroxy-6-methoxyquinazoline (225 mg, 7.0 mmol), (prepared as described for the starting material in Example 2), tributylphosphine (420 mg, 2.11 mmol) and 42-hydroxyethyl)-1,1-dioxothiomorpholine (140 mg, 7.8 mmol) in methylene chloride (10 ml). The mixture was stirred for 18 hours, diluted with ether and the resulting precipitate was removed by filtration. The volatiles were removed from the filtrate by evaporation, and the residue was dissolved in acetone and ethereal hydrogen chloride (14 ml of a 1M solution, 14 mmol) and the precipitate was collected by filtration. The residue was purified by column chromatography eluting with methylene chloride/methanol/aqueous ammonia (150/8/1). The purified product was triturated with ether/methylene chloride collected by filtration and dried to give 4-(4-chloro-2-fluoroanilino)-7-(241,1-dioxothiomorpholino)ethoxy)6-methoxyquinazoline (120 mg, 36%).

Workup

  1. custom(prepared
  2. customthe resulting precipitate was removed by filtration
  3. customThe volatiles were removed from the filtrate by evaporation
  4. dissolutionthe residue was dissolved in acetone
  5. filtrationethereal hydrogen chloride (14 ml of a 1M solution, 14 mmol) and the precipitate was collected by filtration
  6. customThe residue was purified by column chromatography
  7. washeluting with methylene chloride/methanol/aqueous ammonia (150/8/1)
  8. customThe purified product was triturated with ether/methylene chloride
  9. filtrationcollected by filtration
  10. customdried

Sources & evidence

ORD record
ord-9fb84776ea1545699ccc4114e0d4627b
Source dataset
uspto-grants-2005_05
Patent number
US06897210B2

Reaction notes

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