Diisopropylethylamine → tert-Butyl 4-((2-isopropylthiazol-4-yl)methyl)piperazine-1-carboxylate

HRID 416902ノート

反応式

HRID 416902 の反応式
Cl[CH2:2][C:3]1[N:4]=[C:5]([CH:8]([CH3:10])[CH3:9])[S:6][CH:7]=1.CCN(C(C)C)C(C)C.[C:20]([N:27]1[CH2:32][CH2:31][NH:30][CH2:29][CH2:28]1)([O:22][C:23]([CH3:26])([CH3:25])[CH3:24])=[O:21]>C(Cl)Cl.CCOC(C)=O>[CH:8]([C:5]1[S:6][CH:7]=[C:3]([CH2:2][N:30]2[CH2:29][CH2:28][N:27]([C:20]([O:22][C:23]([CH3:26])([CH3:25])[CH3:24])=[O:21])[CH2:32][CH2:31]2)[N:4]=1)([CH3:10])[CH3:9]

参加物

6

反応物 3

HCID 81531DiisopropylethylamineHCID 143452tert-Butyl piperazine-1-carboxylateHCID 27631934-(Chloromethyl)-2-isopropyl-1,3-thiazole

生成物 1

HCID 57897180tert-Butyl 4-((2-isopropylthiazol-4-yl)methyl)piperazine-1-carboxylate収率 65%

試薬・触媒・溶媒 2

HCID 6344Dichloromethane溶媒HCID 8857Ethyl Acetate溶媒

反応条件

温度
35 °C

実験手順

4-(Chloromethyl)-2-isopropyl-thiazole (0.500 g, 2.85 mmol, 1 eq) was suspended in DCM (4.5 mL). DIPEA (1.24 mL, 7.1 mmol, 2.5 eq) was added dropwise, followed by N-Boc-piperazine (1.170 g, 6.3 mmol, 2.2. eq). The reaction mixture was stirred at 35° C. for 5 h, then diluted with EtOAc, and washed with H2O and brine. The organic layer was separated, dried (MgSO4) and the solvent removed in vacuo. The crude product was purified by column chromatography on a Biotage SP1 system (DCM/EtOAc; v/v 1:1) to give the title compound as a clear oil (0.600 g, 65%); 1H-NMR (500 MHz, CDCl3): δ 1.39 (d, J=7.0 Hz, 6H, iPr—CH3), 1.46 (s, 9H, C(CH3)3), 2.47 (br t, J=5.0 Hz, 4H, piperazine N(CH2)2), 3.34 (m, 1H, iPr—CH), 3.6 (br t, J=5.0 Hz, 4H, piperazine N(CH2)2), 3.66 (s, 2H, NCH2), 6.98 (s, 1H, thiazole 5-H); LC (Method B)-MS (ESI, m/z): Rt=2.80 min—326 [(M+H)+, 100%].

後処理

  1. washwashed with H2O and brine
  2. customThe organic layer was separated
  3. dry with materialdried (MgSO4)
  4. customthe solvent removed in vacuo
  5. customThe crude product was purified by column chromatography on a Biotage SP1 system (DCM/EtOAc; v/v 1:1)

出典と根拠

ORDレコード
ord-35cfde9b68d04fb2828c4ce125075240
出典データセット
uspto-grants-2012_01
特許番号
US08088761B2

反応ノート

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