Hydrochloric Acid → 2,5-Dichlorobenzoylpiperidine

HRID 400258

반응식

HRID 400258 반응식
[Cl:1][C:2]1[CH:10]=[CH:9][C:8]([Cl:11])=[CH:7][C:3]=1[C:4](Cl)=[O:5].[NH:12]1[CH2:17][CH2:16][O:15][CH2:14][CH2:13]1.[NH:18]1[CH2:23][CH2:22][CH2:21][CH2:20][CH2:19]1.Cl>[Cl-].[Al+3].[Cl-].[Cl-].C1(C)C=CC=CC=1.N1C=CC=CC=1.C1C=CC=CC=1>[Cl:1][C:2]1[CH:10]=[CH:9][C:8]([Cl:11])=[CH:7][C:3]=1[C:4]([N:12]1[CH2:17][CH2:16][O:15][CH2:14][CH2:13]1)=[O:5].[Cl:1][C:2]1[CH:10]=[CH:9][C:8]([Cl:11])=[CH:7][C:3]=1[C:4]([N:18]1[CH2:23][CH2:22][CH2:21][CH2:20][CH2:19]1)=[O:5]

참가 물질

10

반응물 4

HCID 313Hydrochloric AcidHCID 8082PiperidineHCID 8083MorpholineHCID 179452,5-Dichlorobenzoyl chloride

생성물 2

HCID 8682952,5-DichlorobenzoylpiperidineHCID 868908(2,5-Dichlorophenyl)(morpholino)methanone

시약·촉매·용매 4

HCID 6451240Aluminum(III) Chloride촉매HCID 241Benzene용매HCID 1049Pyridine용매HCID 1140Toluene용매2회

실험 절차

2,5-dichlorobenzoyl-containing compounds (e.g. 2,5-dichlorobenzophenones and 2,5-dichlorobenzamides) can be readily prepared from 2,5-dichlorobenzoylchloride. Pure 2,5-dichlorobenzoylchloride is obtained by vacuum distillation of the mixture obtained from the reaction of commercially available 2,5-dichlorobenzoic acid with a slight excess of thionyl chloride in refluxing toluene. 2,5-dichlorobenzophenones (2,5-dichlorobenzophenone, 2,5-dichloro-4'-methylbenzophenone,2,5-dichloro-4'-meth-oxybenzophenone, and 2,5-dichloro-4'-phenoxy-benzo-phenone) are prepared by the Friedel-Crafts benzoylations of benzene and substituted benzenes (e.g. toluene, anisole, diphenyl ether), respectively, with 2,5-dichlorobenzoylchloride at 0°-5° C. using 2-3 mol equivalents of aluminum chloride as a catalyst. The solid products obtained upon quenching with water are purified by recrystallization from toluene/hexanes. 2,5-dichlorobenzoylmorpholine and 2,5-dichloro-benzoylpiperidine are prepared from the reaction of 2,5-dichlorobenzoylchloride and either morpholine or piperidine, respectively, in toluene with pyridine added to trap the HCl that is evolved. After washing away the pyridinium salt and any excess amine, the product is crystallized from the toluene solution.

후처리

  1. customat 0°-5° C.
  2. customThe solid products obtained
  3. customupon quenching with water
  4. customare purified by recrystallization from toluene/hexanes
  5. washAfter washing away the pyridinium salt
  6. customany excess amine, the product is crystallized from the toluene solution

출처 및 근거

ORD 기록
ord-33ff48109f5c40dfa17c6374646dd058
출처 데이터셋
uspto-grants-1998_10
특허 번호
US05827927

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