4-Bromoanisole → tert-butyl 4-(4-methoxyphenyl)piperazine-1-carboxylate

HRID 1405454노트

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HRID 1405454 반응식
[N:1]1([C:7]([O:9][C:10]([CH3:13])([CH3:12])[CH3:11])=[O:8])[CH2:6][CH2:5][NH:4][CH2:3][CH2:2]1.Br[C:15]1[CH:20]=[CH:19][C:18]([O:21][CH3:22])=[CH:17][CH:16]=1.CC(C1C=C(C(C)C)C(C2C=CC=CC=2P(C2CCCCC2)C2CCCCC2)=C(C(C)C)C=1)C.CC([O-])(C)C.[Na+]>C1(C)C=CC=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.[Pd].[Pd]>[CH3:22][O:21][C:18]1[CH:19]=[CH:20][C:15]([N:4]2[CH2:5][CH2:6][N:1]([C:7]([O:9][C:10]([CH3:13])([CH3:12])[CH3:11])=[O:8])[CH2:2][CH2:3]2)=[CH:16][CH:17]=1

참가 물질

7

반응물 4

HCID 77304-BromoanisoleHCID 143452tert-Butyl piperazine-1-carboxylateHCID 111557942-Dicyclohexylphosphino-2',4',6'-triisoprophylbiphenylHCID 23676156Sodium t-butoxide

생성물 1

HCID 10935225tert-butyl 4-(4-methoxyphenyl)piperazine-1-carboxylate수율 89.8%

시약·촉매·용매 2

HCID 9811564Bis(dibenzylideneacetone)palladium촉매HCID 1140Toluene용매

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온도
100 °C

실험 절차

A suspension of t-butyl piperazine-1-carboxylate (2 g, 10.75 mmol, 2.00 equiv), 1-bromo-4-methoxybenzene (1 g, 5.38 mmol, 1.00 equiv), X-phos (257.2 mg, 0.54 mmol, 0.10 equiv), Pd2(dba)3 (248.4 mg, 0.27 mmol, 0.05 equiv), and NaOt-Bu (1.62 g, 16.88 mmol, 3.00 equiv) in toluene (15 mL) was placed in a 100-mL round bottom flask, stirred overnight at 100° C. in an oil bath, then concentrated under vacuum. Purification via silica gel column (PE/EA (50:1)) yielded 1.412 g (81%) of t-butyl 4-(4-methoxyphenyl)piperazine-1-carboxylate as a yellow solid.

후처리

  1. customwas placed in a 100-mL round bottom flask
  2. concentrationconcentrated under vacuum
  3. customPurification via silica gel column (PE/EA (50:1))

출처 및 근거

ORD 기록
ord-a5cd20cd3ee94837ba0997457d2dbfbb
출처 데이터셋
uspto-grants-2014_12
특허 번호
US08916560B2

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