Chloroacetyl chloride → 7,8-Difluoro-6-methoxycarbonyl-4H-benzo[1,4]oxazine-3-one

HRID 495443노트

반응식

HRID 495443 반응식
[CH3:1][O:2][C:3](=[O:14])[C:4]1[CH:9]=[C:8]([NH2:10])[C:7]([OH:11])=[C:6]([F:12])[C:5]=1[F:13].C(=O)([O-])O.[Na+].Cl[CH2:21][C:22](Cl)=[O:23]>[Cl-].C([N+](CC)(CC)CC)C1C=CC=CC=1.C(Cl)(Cl)Cl>[F:13][C:5]1[C:4]([C:3]([O:2][CH3:1])=[O:14])=[CH:9][C:8]2[NH:10][C:22](=[O:23])[CH2:21][O:11][C:7]=2[C:6]=1[F:12]

참가 물질

6

반응물 3

HCID 6577Chloroacetyl chlorideHCID 516892Sodium BicarbonateHCID 450896375-Amino-2,3-difluoro-4-hydroxy-benzoic acid methyl ester

생성물 1

HCID 223266717,8-Difluoro-6-methoxycarbonyl-4H-benzo[1,4]oxazine-3-one수율 56.1%

시약·촉매·용매 2

HCID 66133Benzyl triethylammonium chloride촉매HCID 6212Chloroform용매

실험 절차

A mixture of 5-amino-2,3-difluoro-4-hydroxy-benzoic acid methyl ester (5.5 g, 27.1 mmol) and benzyl-triethylammonium chloride (6.2 g) in chloroform (300 mL) was warmed and sonicated until most of the solid was dissolved. The mixture was cooled in an ice bath and sodium hydrogen carbonate (10 g) was added, followed by chloroacetyl chloride (2.4 mL, 29 mmol). The combined mixture was stirred in cold for 1 hour and then under reflux for approximately 9 hours. It was then evaporated in vacuo and the resulting residue was treated with water and chloroform to give a solid. This solid was collected by filtration, washed with water, diethyl ether and dried in vacuo to give the title compound (3.7 g, 56%).

후처리

  1. temperaturewas warmed
  2. customsonicated until most of the solid
  3. dissolutionwas dissolved
  4. temperatureThe mixture was cooled in an ice bath
  5. temperatureunder reflux for approximately 9 hours
  6. customIt was then evaporated in vacuo
  7. additionthe resulting residue was treated with water and chloroform
  8. customto give a solid
  9. filtrationThis solid was collected by filtration
  10. washwashed with water, diethyl ether
  11. customdried in vacuo

출처 및 근거

ORD 기록
ord-9c9d064983b3443e875b621f54cc65f7
출처 데이터셋
uspto-grants-2005_09
특허 번호
US06939871B2

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