Cesium carbonate → HCID 69285072, compound

HRID 2201139Notes

Reaction equation

HRID 2201139 reaction equation
[NH2:1][C:2](=[O:20])[C@H:3]([NH:12][C:13](=[O:19])[O:14][C:15]([CH3:18])([CH3:17])[CH3:16])[CH2:4][C:5]1[CH:10]=[CH:9][C:8](I)=[CH:7][CH:6]=1.[N:21]1[CH:26]=[CH:25][CH:24]=[CH:23][C:22]=1B1OC(C)(C)C(C)(C)O1.C([O-])([O-])=O.[Cs+].[Cs+]>CN(C=O)C.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].CC([O-])=O.CC([O-])=O.[Pd+2].Cl[Cu]>[NH2:1][C:2](=[O:20])[C@H:3]([NH:12][C:13](=[O:19])[O:14][C:15]([CH3:18])([CH3:17])[CH3:16])[CH2:4][C:5]1[CH:10]=[CH:9][C:8]([C:22]2[CH:23]=[CH:24][CH:25]=[CH:26][N:21]=2)=[CH:7][CH:6]=1

Participants

8

Reactant 3

HCID 10796Cesium carbonateHCID 11241171Pyridine-2-boronic acid, pinacol esterHCID 67516556HCID 67516556, compound

Product 1

HCID 69285072HCID 69285072, compoundYield 33.5%

Reagents, catalysts & solvents 4

HCID 62652Cuprous chlorideCatalystHCID 167845palladium(II) acetateCatalystHCID 635956Ferrocene-1,1'-bis-(diphenylphosphine)CatalystHCID 6228DimethylformamideSolvent

Procedure

A mixture of (R)-tert-butyl 1-amino-3-(4-iodophenyl)-1-oxopropan-2-ylcarbamate (970 mg, 2.48 mmol), pyridine-2-boronic acid pinacol ester (505 mg, 2.46 mmol), dppf (275 mg, 0.496 mmol), Cs2CO3 (1.00 g, 3.06 mmol), Pd(OAc)2 (56 mg, 0.249 mmol) and CuCl (25 mg, 0.252 mmol) in DMF (10 mL) was degassed with argon, then was stirred at 100 C for 18 h. Water and EtOAc were added. The organic phase was separated, dried over Na2SO4, concentrated in vacuo. The residue was purified by a silica gel column, which was eluted with 20-100% EtOAc in hexane to give (R)-tert-butyl 1-amino-1-oxo-3-(4-(pyridin-2-yl)phenyl)propan-2-ylcarbamate (281 mg).

Workup

  1. customwas degassed with argon
  2. additionWater and EtOAc were added
  3. customThe organic phase was separated
  4. dry with materialdried over Na2SO4
  5. concentrationconcentrated in vacuo
  6. customThe residue was purified by a silica gel column, which
  7. washwas eluted with 20-100% EtOAc in hexane

Sources & evidence

ORD record
ord-fd5da5a078904334889e0b93d4f5719e
Source dataset
uspto-grants-2016_06
Patent number
US09359375B2

Reaction notes

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