Hydrochloric Acid → Ethyl 1-cyclopropyl-8-(difluoromethoxy)-6,7-difluoro-4-oxo-1,4-dihydroquinoline-3-carboxylate

HRID 1461026노트

반응식

HRID 1461026 반응식
[CH:1]1([NH:4][CH:5]=[C:6]([C:12](=[O:26])[C:13]2[CH:18]=[C:17]([F:19])[C:16]([F:20])=[C:15]([O:21][CH:22]([F:24])[F:23])[C:14]=2F)[C:7]([O:9][CH2:10][CH3:11])=[O:8])[CH2:3][CH2:2]1.[H-].[Na+].Cl>C(OCC)C>[CH:1]1([N:4]2[C:14]3[C:13](=[CH:18][C:17]([F:19])=[C:16]([F:20])[C:15]=3[O:21][CH:22]([F:24])[F:23])[C:12](=[O:26])[C:6]([C:7]([O:9][CH2:10][CH3:11])=[O:8])=[CH:5]2)[CH2:3][CH2:2]1

참가 물질

5

반응물 3

HCID 313Hydrochloric AcidHCID 24758Sodium hydrideHCID 178471879HCID 178471879, 화합물

생성물 1

HCID 15023786Ethyl 1-cyclopropyl-8-(difluoromethoxy)-6,7-difluoro-4-oxo-1,4-dihydroquinoline-3-carboxylate

시약·촉매·용매 1

HCID 3283Diethyl Ether용매

실험 절차

The whole of the ethyl 3-cyclopropylamino-2-(3-difluoromethoxy-2,4,5-trifluorobenzoyl)acrylate [(XIX), R1 =--OCHF2, R3' =H, R17 =C2H5, X=X'=F] [prepared as described in step (c) above] was dissolved in 150 ml of anhydrous diethyl ether, and then 0.39 g (0.0098 moles) of a 60% w/w suspension of sodium hydride in mineral oil was added in portions, whilst stirring at room temperature, to the resulting solution. After completion of the addition, the stirring was continued at room temperature for an additional 1 hour, and then the mixture was acidified by the addition of 1N aqueous hydrochloric acid with vigorous stirring. The reaction mixture was filtered and washed with water and with diethyl ether, in that order, to give 1.44 g of ethyl 1-cyclopropyl-8-difluoromethoxy-6,7-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylate as colorless needles, melting at 224°-226° C.

후처리

  1. additionwas added in portions
  2. additionAfter completion of the addition
  3. filtrationThe reaction mixture was filtered
  4. washwashed with water and with diethyl ether, in that order

출처 및 근거

ORD 기록
ord-9fd4d6a82bcf4ea8a37c098cfb007d7c
출처 데이터셋
uspto-grants-1991_12
특허 번호
US05073556

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