Triethylamine → tert-Butyl (2R)-2-[(4-benzylpiperazin-1-yl)carbonyl]piperazine-1-carboxylate

HRID 2371153ノート

反応式

HRID 2371153 の反応式
[CH2:1]([N:8]1[CH2:13][CH2:12][NH:11][CH2:10][CH2:9]1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[C:14]([N:21]1[CH2:26][CH2:25][NH:24][CH2:23][C@@H:22]1[C:27](O)=[O:28])([O:16][C:17]([CH3:20])([CH3:19])[CH3:18])=[O:15].C(N(CC)CC)C.C1CN([P+](ON2N=NC3C=CC=CC2=3)(N2CCCC2)N2CCCC2)CC1.F[P-](F)(F)(F)(F)F>CN(C=O)C>[CH2:1]([N:8]1[CH2:13][CH2:12][N:11]([C:27]([C@H:22]2[CH2:23][NH:24][CH2:25][CH2:26][N:21]2[C:14]([O:16][C:17]([CH3:20])([CH3:19])[CH3:18])=[O:15])=[O:28])[CH2:10][CH2:9]1)[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1

参加物

6

反応物 4

HCID 8471TriethylamineHCID 759941-BenzylpiperazineHCID 2724699PyBOPHCID 24820285(2R)-1-(tert-Butoxycarbonyl)piperazine-2-carboxylic acid

生成物 1

HCID 57656790tert-Butyl (2R)-2-[(4-benzylpiperazin-1-yl)carbonyl]piperazine-1-carboxylate

試薬・触媒・溶媒 1

HCID 6228Dimethylformamide溶媒

反応条件

温度
0 °C

実験手順

1-Benzylpiperazine (2.7 ml) and (2R)-1-BOC-piperazine-2-carboxylic acid (3.571 g) were suspended in DMF (150 ml) and stirred at 0° C. Triethylamine (4.33 ml) was added followed by PyBOP reagent (8.08 g). The mixture was allowed to warm to room temperature overnight, concentrated to approximately a third of the volume in vacuo and partitioned between brine (75 ml) and ethyl acetate (2×200 ml). Combined organic extracts were treated with saturated aqueous sodium bicarbonate (75 ml) and brine (75 ml), dried (sodium sulphate), concentrated in vacuo using high vacuum to remove DMF traces and purified by chromatography eluting with 0-15% methanol/dichloromethane. This gave tert-butyl (2R)-2-[(4-benzylpiperazin-1-yl)carbonyl]piperazine-1-carboxylate as a white glass (5.01 g).

後処理

  1. temperatureto warm to room temperature overnight
  2. concentrationconcentrated to approximately a third of the volume in vacuo
  3. custompartitioned between brine (75 ml) and ethyl acetate (2×200 ml)
  4. additionCombined organic extracts were treated with saturated aqueous sodium bicarbonate (75 ml) and brine (75 ml)
  5. dry with materialdried (sodium sulphate)
  6. concentrationconcentrated in vacuo
  7. customto remove DMF traces
  8. custompurified by chromatography
  9. washeluting with 0-15% methanol/dichloromethane

出典と根拠

ORDレコード
ord-d90f1f5f2d524d9b9f6a792823c5ee5f
出典データセット
uspto-grants-2014_04
特許番号
US08710224B2

反応ノート

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