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Methyl isobutyrate → 1,1-Dimethylethyl (2R,6S)-4-({4-[1,1-dimethyl-2-(methyloxy)-2-oxoethyl]phenyl}methyl)-2,6-dimethyl-1-piperazinecarboxylate

HRID 43354
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HRID 43354 반응식
[CH3:1][CH:2]([CH3:7])[C:3]([O:5][CH3:6])=[O:4].C1([N-]C2CCCCC2)CCCCC1.[Li+].Br[C:23]1[CH:28]=[CH:27][C:26]([CH2:29][N:30]2[CH2:35][C@H:34]([CH3:36])[N:33]([C:37]([O:39][C:40]([CH3:43])([CH3:42])[CH3:41])=[O:38])[C@H:32]([CH3:44])[CH2:31]2)=[CH:25][CH:24]=1>C1(C)C=CC=CC=1.[Pd].C(=CC(C=CC1C=CC=CC=1)=O)C1C=CC=CC=1.C(=CC(C=CC1C=CC=CC=1)=O)C1C=CC=CC=1.C(P(C(C)(C)C)C(C)(C)C)(C)(C)C>[CH3:1][C:2]([C:23]1[CH:24]=[CH:25][C:26]([CH2:29][N:30]2[CH2:35][C@H:34]([CH3:36])[N:33]([C:37]([O:39][C:40]([CH3:41])([CH3:43])[CH3:42])=[O:38])[C@H:32]([CH3:44])[CH2:31]2)=[CH:27][CH:28]=1)([CH3:7])[C:3]([O:5][CH3:6])=[O:4]
참가 물질실험 절차후처리출처 및 근거반응 노트

참가 물질

7

반응물 3

HCID 11039Methyl isobutyrateHCID 10932176Lithium dicyclohexylamideHCID 252240971,1-Dimethylethyl (2R,6S)-4-[(4-bromophenyl)methyl]-2,6-dimethyl-1-piperazinecarboxylate

생성물 1

HCID 252242061,1-Dimethylethyl (2R,6S)-4-({4-[1,1-dimethyl-2-(methyloxy)-2-oxoethyl]phenyl}methyl)-2,6-dimethyl-1-piperazinecarboxylate수율 65.5%

시약·촉매·용매 3

HCID 83681
Tris(1,1-dimethylethyl)phosphine
촉매
HCID 1542701,5-Diphenylpenta-1,4-dien-3-one;palladium촉매
HCID 1140Toluene용매

실험 절차

A solution of methyl 2-methylpropanoate (188 ul, 1.64 mmol) in toluene (3 ml) was added to lithium dicyclohexylamide (362 mg, 1.93 mmol) under glove bag conditions. The suspension was stirred for 10 mins then added to a mixture of D43 (570 mg, 1.49 mmol) and bis(dibenzylideneacetone) palladium (0) (43 mg, 0.074 mmol). Tri(tert-butyl)phosphine (18 ul, 0.074 mmol) was added and the reaction mixture stirred at room temperature overnight. The solvent was removed in vacuo and chromatography eluting with 0-90% EtOAc/petroleum ether gave the title compound as a yellow oil (395 mg). δH (CDCl3, 250 MHz) 7.29 (4H, m), 4.07 (2H, m), 3.66 (3H, s), 3.46 (2H, s), 2.61 (2H, m), 2.12 (2H, dd), 1.58 (6H, s), 1.46 (9H, s), 1.29 (6H, d). MS (ES): MH+ 405.

후처리

  1. stirringthe reaction mixture stirred at room temperature overnight
  2. customThe solvent was removed in vacuo and chromatography
  3. washeluting with 0-90% EtOAc/petroleum ether

출처 및 근거

ORD 기록
ord-c5561e98662a4bdd91f7af42e78611f5
출처 데이터셋
uspto-grants-2013_09
DOI
10.6084/m9.figshare.5104873.v1
특허 번호
US08536182B2

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