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Triethylamine → 4-[3-(4-Tert-butoxycarbonylamino-pyridin-3-yl)-propenyl]-3-oxo-piperazine-1-carboxylic acid tert-butyl ester

HRID 1432939
ノート
印刷プレビュー

反応式

HRID 1432939 の反応式
[CH2:1]([N:4]1[CH2:9][CH2:8][N:7]([C:10]([O:12][C:13]([CH3:16])([CH3:15])[CH3:14])=[O:11])[CH2:6][C:5]1=[O:17])[CH:2]=[CH2:3].[C:18]([O:22][C:23](=[O:32])[NH:24][C:25]1[CH:30]=[CH:29][N:28]=[CH:27][C:26]=1I)([CH3:21])([CH3:20])[CH3:19].CC1C=CC=CC=1P(C1C=CC=CC=1C)C1C=CC=CC=1C.CCN(CC)CC>C(Cl)Cl.CC([O-])=O.CC([O-])=O.[Pd+2]>[C:13]([O:12][C:10]([N:7]1[CH2:8][CH2:9][N:4]([CH:1]=[CH:2][CH2:3][C:30]2[CH:29]=[N:28][CH:27]=[CH:26][C:25]=2[NH:24][C:23]([O:22][C:18]([CH3:21])([CH3:20])[CH3:19])=[O:32])[C:5](=[O:17])[CH2:6]1)=[O:11])([CH3:16])([CH3:15])[CH3:14]
参加物反応条件実験手順後処理出典と根拠反応ノート

参加物

7

反応物 4

HCID 8471TriethylamineHCID 80271Tri-o-tolylphosphineHCID 10903275(3-Iodo-pyridin-4-yl)-carbamic acid tert-butyl esterHCID 544523841-(2-Propenyl)-4-tert-butyloxycarbonyl-2-piperazinone

生成物 1

HCID 538781434-[3-(4-Tert-butoxycarbonylamino-pyridin-3-yl)-propenyl]-3-oxo-piperazine-1-carboxylic acid tert-butyl ester

試薬・触媒・溶媒 2

HCID 167845palladium(II) acetate触媒
HCID 6344Dichloromethane溶媒

反応条件

温度
100 °C

実験手順

1-Allyl-4-(tert-butyloxycarbonyl)-piperazin-2-one (0.49 g, 2.0 mmol) is treated with (3-iodo-pyridin-4-yl)-carbamic acid tert-butyl ester (0.64 g, 2.0 mmol), Pd(OAc)2 (14 mg, 0.06 mmol), P(o-tol)3 (37 mg, 0.12 mmol), and Et3N (0.56 mmol) in a seal tube. The mixture is stirred at 100° C. overnight, then diluted with CH2Cl2 and washed H2O (2×). The CH2Cl2 layer is concentrated and the residue is chromatographed (5% MeOH/CH2Cl2) to give a mixture of two isomers (0.40 g, 0.92 mmol). The mixture is separated into its constituent isomers upon further chromatography (EtOAc) to give 4-[3-(4-tert-butoxycarbonylamino-pyridin-3-yl)-propenyl]-3-oxo-piperazine-1-carboxylic acid tert-butyl ester (90 mg, 0.21 mmol, higher Rf value) and 4-[3-(4-tert-butoxycarbonylamino-pyridin-3-yl)-allyl]-3-oxo-piperazine-1-carboxylic acid tert-butyl ester_(0.24 g, 0.56 mmol, lower Rf value). For the former: MS m/z 433 (M+1); 1H NMR (CDCl3, 300 MHz) δ8.38 (d, 1H), 8.28 (s, 1H), 7.93 (d, 1H), 7.48 (d, 1H), 6.67 (s, 1H), 5.10 (m, 1H), 4.15 (s, 2H), 3.70 (t, 2H), 3,46 (t, 2H), 3.39 (d, 2H), 1.48 (s, 9H), 1.45 (s, 9H). For the latter: MS m/z 433 (M+1); 1H NMR (CDCl3, 300 MHz) δ8.39 (s, 1H), 8.37 (d, 1H), 7.98 (d, 1H), 6.77 (s, 1H), 6.52 (d, 1H), 6.07 (m, 1H), 4.23 (d, 2H), 4.12 (s, 2H), 3,69 (t, 2H), 3.40 (t, 2H), 1.52 (s, 9H), 1.45 (s, 9H).

後処理

  1. washwashed H2O (2×)
  2. concentrationThe CH2Cl2 layer is concentrated
  3. customthe residue is chromatographed (5% MeOH/CH2Cl2)
  4. customto give
  5. additiona mixture of two isomers (0.40 g, 0.92 mmol)
  6. customThe mixture is separated into its constituent isomers upon further chromatography (EtOAc)

出典と根拠

ORDレコード
ord-a4c2f43942d54d8287ef4ae1ebe664cd
出典データセット
uspto-grants-2009_11
DOI
10.6084/m9.figshare.5104873.v1
特許番号
US07612075B2

反応ノート

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