Dimethylformamide → 1,1-dimethylethyl (2R)-4-[(4-cyano-2-methylphenyl)sulfonyl]-2-methyl-1-piperazinecarboxylate

HRID 43375ノート

反応式

HRID 43375 の反応式
Br[C:2]1[CH:7]=[CH:6][C:5]([S:8]([N:11]2[CH2:16][CH2:15][N:14]([C:17]([O:19][C:20]([CH3:23])([CH3:22])[CH3:21])=[O:18])[C@H:13]([CH3:24])[CH2:12]2)(=[O:10])=[O:9])=[C:4]([CH3:25])[CH:3]=1.[CH3:26][N:27](C=O)C>[C-]#N.[C-]#N.[Zn+2].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].C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.[Fe+2]>[C:26]([C:2]1[CH:7]=[CH:6][C:5]([S:8]([N:11]2[CH2:16][CH2:15][N:14]([C:17]([O:19][C:20]([CH3:22])([CH3:23])[CH3:21])=[O:18])[C@H:13]([CH3:24])[CH2:12]2)(=[O:9])=[O:10])=[C:4]([CH3:25])[CH:3]=1)#[N:27]

参加物

6

反応物 2

HCID 6228DimethylformamideHCID 591613521,1-dimethylethyl (2R)-4-[(4-bromo-2-methylphenyl)sulfonyl]-2-methyl-1-piperazinecarboxylate

生成物 1

HCID 591613281,1-dimethylethyl (2R)-4-[(4-cyano-2-methylphenyl)sulfonyl]-2-methyl-1-piperazinecarboxylate

試薬・触媒・溶媒 3

HCID 11186Zinc cyanide (Zn(CN)2)触媒HCID 635956Ferrocene-1,1'-bis-(diphenylphosphine)触媒HCID 9811564Bis(dibenzylideneacetone)palladium触媒

反応条件

温度
120 °C

実験手順

Ar was bubbled through a solution of 1,1-dimethylethyl (2R)-4-[(4-bromo-2-methylphenyl)sulfonyl]-2-methyl-1-piperazinecarboxylate (may be prepared as described in Description 18) (4.34 g, 10.0 mmol) in dry DMF (40 ml) for 30 min, then Zn(CN)2 (0.647 g, 5.51 mmol), Pd2 (dba)3 (0.275 g, 0.300 mmol) and DPPF (0.333 g, 0.601 mmol) were added and the resulting brown solution stirred at 120° C. under Ar for 1 h. The mixture was cooled to room temperature, concentrated under vacuum and the residue partitioned between DCM (100 ml) and water (100 ml). The aqueous layer was extracted with DCM (2×50 ml), then the combined organic layers passed through a hydrophobic frit. Concentration gave a brown residue that was purified by flash chromatography (silica; Flash 40M; linear gradient (8-66%) EtOAc in isohexane) to give the title compound as a viscous pale yellow oil (3.42 g).

後処理

  1. temperatureThe mixture was cooled to room temperature
  2. concentrationconcentrated under vacuum
  3. customthe residue partitioned between DCM (100 ml) and water (100 ml)
  4. extractionThe aqueous layer was extracted with DCM (2×50 ml)
  5. concentrationConcentration
  6. customgave a brown residue that
  7. customwas purified by flash chromatography (silica; Flash 40M; linear gradient (8-66%) EtOAc in isohexane)

出典と根拠

ORDレコード
ord-8e43d2aa986c4b239130ce70e759f631
出典データセット
uspto-grants-2013_09
特許番号
US08536183B2

反応ノート

読み込み中…