Triethylamine → ethyl 4-(2,3-dimethoxy-6,7-dihydro-5H-benzocyclohepten-8-ylcarbonyl)piperazine-2-carboxylate

HRID 358774노트

반응식

HRID 358774 반응식
[CH3:1][O:2][C:3]1[C:4]([O:17][CH3:18])=[CH:5][C:6]2[CH2:12][CH2:11][CH2:10][C:9]([C:13](Cl)=[O:14])=[CH:8][C:7]=2[CH:16]=1.Cl.[NH:20]1[CH2:25][CH2:24][NH:23][CH2:22][CH:21]1[C:26]([O:28][CH2:29][CH3:30])=[O:27].C(N(CC)CC)C>ClCCl>[CH3:1][O:2][C:3]1[C:4]([O:17][CH3:18])=[CH:5][C:6]2[CH2:12][CH2:11][CH2:10][C:9]([C:13]([N:23]3[CH2:24][CH2:25][NH:20][CH:21]([C:26]([O:28][CH2:29][CH3:30])=[O:27])[CH2:22]3)=[O:14])=[CH:8][C:7]=2[CH:16]=1

참가 물질

5

반응물 3

HCID 8471TriethylamineHCID 102649462,3-dimethoxy-6,7-dihydro-5H-benzocycloheptene-8-carbonylchlorideHCID 20066599Ethyl piperazine-2-carboxylate hydrochloride

생성물 1

HCID 10249683ethyl 4-(2,3-dimethoxy-6,7-dihydro-5H-benzocyclohepten-8-ylcarbonyl)piperazine-2-carboxylate수율 74.9%

시약·촉매·용매 1

HCID 6344Dichloromethane용매2회

실험 절차

A solution of 2,3-dimethoxy-6,7-dihydro-5H-benzocycloheptene-8-carbonylchloride (1.1 g) in dichloromethane (12 ml) is added dropwise, taking 30 minutes while stirring under ice-cooling, to a mixture of ethyl piperazine-2-carboxylate hydrochloride (1.0 g), triethylamine (0.5 g) and dichloromethane (20 ml). The reaction mixture is stirred for one hour at 0 ° C, and then poured into ice-water, followed by extraction with dichloromethane. The organic layer is washed with water and dried, then the solvent is distilled off under reduced pressure. The residue is purified by means of a silica gel column chromatography (hexane:ethyl acetate:acetone=1:1:1) to afford ethyl 4-(2,3-dimethoxy-6,7-dihydro-5H-benzocyclohepten-8-ylcarbonyl)piperazine-2-carboxylate as crystals (1.2 g). This product is recrystallized form ethyl acetate and hexane to give colorless prisms, m.p. 105-106° C.

후처리

  1. stirringThe reaction mixture is stirred for one hour at 0 ° C
  2. extractionfollowed by extraction with dichloromethane
  3. washThe organic layer is washed with water
  4. customdried
  5. distillationthe solvent is distilled off under reduced pressure
  6. customThe residue is purified by means of a silica gel column chromatography (hexane:ethyl acetate:acetone=1:1:1)

출처 및 근거

ORD 기록
ord-118d593301e64a48a06d76945cd1dde4
출처 데이터셋
uspto-grants-1991_03
특허 번호
US04997836

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