Cesium carbonate → (S)-2-(6-Methoxy-5-nitro-pyridin-2-yloxymethyl)-pyrrolidine-1-carboxylic Acid Tert-Butyl Ester

HRID 390305

Reaction equation

HRID 390305 reaction equation
C1(C2C3C(=CC=CC=3)C=CC=2)C2C(=CC=CC=2)C=CC=1P(C(C)(C)C)C(C)(C)C.Br[C:31]1[N:36]=[C:35]([O:37][CH3:38])[C:34]([N+:39]([O-:41])=[O:40])=[CH:33][CH:32]=1.C([O-])([O-])=O.[Cs+].[Cs+].[C:48]([O:52][C:53]([N:55]1[CH2:59][CH2:58][CH2:57][C@H:56]1[CH2:60][OH:61])=[O:54])([CH3:51])([CH3:50])[CH3:49]>C1(C)C=CC=CC=1.CC([O-])=O.CC([O-])=O.[Pd+2]>[C:48]([O:52][C:53]([N:55]1[CH2:59][CH2:58][CH2:57][C@H:56]1[CH2:60][O:61][C:31]1[CH:32]=[CH:33][C:34]([N+:39]([O-:41])=[O:40])=[C:35]([O:37][CH3:38])[N:36]=1)=[O:54])([CH3:51])([CH3:50])[CH3:49]

Participants

7

Procedure

To a mixture of Pd(OAc)2 (0.08 g, 0.34 mmol) and [1,1′]binaphthalen-2-yl-di-tert-butyl-phosphane (0.14 g, 0.34 mmol) in toluene (10 ml) was added 6-bromo-2-methoxy-3-nitropyridine(1.0 g, 4.29 mmol), Cs2CO3 (3.5 g, 10.73 mmol), and (S)-2-hydroxymethyl-pyrrolidine-1-carboxylic acid tert-butyl ester (1.73 g, 8.58 mmol). The mixture was stirred under nitrogen at room temperature for 24 h. After evaporation of the solvent under reduced pressure, the residue was purified by silica gel chromatography with dichloromethane/ethyl acetate/methanol (10:0:0; 9:0.5:0.5; 7:1.5:1.5; 0:5:5) as eluent to provide 0.11 g (7.5%) of the product.

Workup

  1. customAfter evaporation of the solvent under reduced pressure
  2. customthe residue was purified by silica gel chromatography with dichloromethane/ethyl acetate/methanol (10:0:0; 9:0.5:0.5; 7:1.5:1.5; 0:5:5) as eluent

Sources & evidence

ORD record
ord-daa5133780a24e8ea1a1896e1fb710be
Source dataset
uspto-grants-2013_02
Patent number
US08383641B2

Linked notes

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