Chloroform → Tert-butyl 2-(4-aminophenyl)pyrrolidine-1-carboxylate

HRID 2236507

反応式

HRID 2236507 の反応式
[Li+].C[Si]([N-:6][Si](C)(C)C)(C)C.C(Cl)(Cl)Cl.P(C(C)(C)C)(C(C)(C)C)C(C)(C)C.[H+].[B-](F)(F)(F)F.[C:34]([O:38][C:39]([N:41]1[CH2:45][CH2:44][CH2:43][CH:42]1[C:46]1[CH:51]=[CH:50][C:49](Br)=[CH:48][CH:47]=1)=[O:40])([CH3:37])([CH3:36])[CH3:35]>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].C1(C)C=CC=CC=1>[C:34]([O:38][C:39]([N:41]1[CH2:45][CH2:44][CH2:43][CH:42]1[C:46]1[CH:51]=[CH:50][C:49]([NH2:6])=[CH:48][CH:47]=1)=[O:40])([CH3:37])([CH3:36])[CH3:35]

参加物

8

反応物 5

HCID 6212ChloroformHCID 28118Tetrafluoroboric acidHCID 83681Tris(1,1-dimethylethyl)phosphineHCID 2733832Lithium HexamethyldisilazideHCID 53407516tert-Butyl 2-(4-bromophenyl)pyrrolidine-1-carboxylate

生成物 1

HCID 44607625Tert-butyl 2-(4-aminophenyl)pyrrolidine-1-carboxylate収率 83%

試薬・触媒・溶媒 2

HCID 9811564Bis(dibenzylideneacetone)palladium触媒HCID 1140Toluene溶媒

実験手順

LiHMDS (1.6 g, 9.6 mmol) is added to a 100 mL round bottom flask. Toluene (20 mL) is added followed by addition of Pd2(dba)3.CHCl3 (50 mg, 0.05 mmol) and P(tBu)3.HBF4 (40 mg, 0.14 mmol). 2-(4-Bromo-phenyl)-pyrrolidine-1-carboxylic acid tert-butyl ester (1.5 g, 4.6 mmol) is added to the flask. After degasing, the mixture is stirred at room temperature overnight. After TLC suggested no starting bromide is left, the reaction mixture is diluted with ether and poured into dilute HCl (aq). The ether layer is discarded, the aqueous layer is basified with NH4OH and extracted with EtOAc. The EtOAc layer is dried and concentrated to provide the desired product (1.0 g, 83%). 1H NMR (300 MHz, CDCl3) ∂ 6.94-6.96 (2H, m), 6.60-6.67 (2H, m), 4.67-4.85 (1H, m), 3.58 (4H, br), 2.24 (1H, m), 1.73-1.97 (3H, m), 1.44 (3H, s), 1.21 (6H, s).

後処理

  1. customAfter degasing
  2. waitis left
  3. additionthe reaction mixture is diluted with ether
  4. additionpoured into dilute HCl (aq)
  5. extractionextracted with EtOAc
  6. dry with materialThe EtOAc layer is dried
  7. concentrationconcentrated

出典と根拠

ORDレコード
ord-791a14add560472c9c4d37d86e6eb5b9
出典データセット
uspto-grants-2010_05
特許番号
US07713994B2

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