Acetic Acid → ethyl N-(3-amino4-chloro-6-fluoro-2-methoxyphenyl)carbamate

HRID 1421463

반응식

HRID 1421463 반응식
[Cl:1][C:2]1[CH:7]=[C:6]([F:8])[C:5]([NH:9][C:10](=[O:14])[O:11][CH2:12][CH3:13])=[C:4]([O:15][CH3:16])[C:3]=1[N+:17]([O-])=O.C(O)(=O)C.C(O)C.Cl>C(Cl)Cl.[Fe]>[NH2:17][C:3]1[C:4]([O:15][CH3:16])=[C:5]([NH:9][C:10](=[O:14])[O:11][CH2:12][CH3:13])[C:6]([F:8])=[CH:7][C:2]=1[Cl:1]

참가 물질

7

반응물 4

HCID 176Acetic AcidHCID 313Hydrochloric AcidHCID 702EthanolHCID 18315060ethyl N-(4-chloro-6-fluoro-2-methoxy-3-nitrophenyl)carbamate

생성물 1

HCID 18315064ethyl N-(3-amino4-chloro-6-fluoro-2-methoxyphenyl)carbamate수율 79.3%

시약·촉매·용매 2

HCID 23925Iron촉매HCID 6344Dichloromethane용매

실험 절차

Under a nitrogen atmosphere, a stirred solution of 21.3 grams (0.072 mole) of ethyl N-(4-chloro-6-fluoro-2-methoxy-3-nitrophenyl)carbamate, 18.3 grams (0.328 mole) of iron powder, 50 mL of acetic acid, and 250 mL of ethanol was heated to 65° C. where it stirred for two hours. At the conclusion of this time, 3 mL (0.036 mole) of 12 M hydrochloric acid was added. Upon completion of addition, the reaction mixture was stirred for an additional two hours. After this time, the reaction mixture was concentrated under reduced pressure to yield a brown oil. The oil was then taken up in methylene chloride. The mixture was filtered through diatomaceous earth, and the filter cake was washed with water and an aqueous saturated sodium bicarbonate solution. The filtrate was stored over sodium sulfate for about 18 hours and then filtered. The solvent was removed under reduced pressure to yield a black oil. This oil was filtered through a silica gel pad, yielding 15.0 grams of ethyl N-(3-amino-4-chloro-6-fluoro-2-methoxyphenyl)carbamate. The NMR spectrum was consistent with the proposed structure.

후처리

  1. additionUpon completion of addition
  2. stirringthe reaction mixture was stirred for an additional two hours
  3. concentrationAfter this time, the reaction mixture was concentrated under reduced pressure
  4. customto yield a brown oil
  5. filtrationThe mixture was filtered through diatomaceous earth
  6. washthe filter cake was washed with water
  7. waitThe filtrate was stored over sodium sulfate for about 18 hours
  8. filtrationfiltered
  9. customThe solvent was removed under reduced pressure
  10. customto yield a black oil
  11. filtrationThis oil was filtered through a silica gel pad

출처 및 근거

ORD 기록
ord-950f8abd08274dd48e341a1e0e574aaa
출처 데이터셋
uspto-grants-2000_06
특허 번호
US06077812

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