Water → Tert-butyl 4-[2'-(2-{[(cyanomethyl)amino]carbonyl}-4-methylpentyl)[1,1'-biphenyl]-4-yl]-1-piperazinecarboxylate

HRID 1744073Notes

Reaction equation

HRID 1744073 reaction equation
Br[C:2]1[CH:19]=[CH:18][CH:17]=[CH:16][C:3]=1[CH2:4][CH:5]([CH2:12][CH:13]([CH3:15])[CH3:14])[C:6]([NH:8][CH2:9][C:10]#[N:11])=[O:7].[C:20]([O:24][C:25]([N:27]1[CH2:32][CH2:31][N:30]([C:33]2[CH:38]=[CH:37][C:36](B(O)O)=[CH:35][CH:34]=2)[CH2:29][CH2:28]1)=[O:26])([CH3:23])([CH3:22])[CH3:21].C(=O)([O-])[O-].[Na+].[Na+].O>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.Cl[Pd]Cl.[Fe+2]>[C:10]([CH2:9][NH:8][C:6]([CH:5]([CH2:12][CH:13]([CH3:15])[CH3:14])[CH2:4][C:3]1[CH:16]=[CH:17][CH:18]=[CH:19][C:2]=1[C:36]1[CH:35]=[CH:34][C:33]([N:30]2[CH2:29][CH2:28][N:27]([C:25]([O:24][C:20]([CH3:23])([CH3:22])[CH3:21])=[O:26])[CH2:32][CH2:31]2)=[CH:38][CH:37]=1)=[O:7])#[N:11]

Participants

7

Reactant 4

HCID 962WaterHCID 10340Sodium CarbonateHCID 52330144-(4-BOC-Piperazino)phenylboronic acidHCID 222361892-(2-bromobenzyl)-N-(cyanomethyl)-4-methylpentanamide

Product 1

HCID 22235962Tert-butyl 4-[2'-(2-{[(cyanomethyl)amino]carbonyl}-4-methylpentyl)[1,1'-biphenyl]-4-yl]-1-piperazinecarboxylate

Reagents, catalysts & solvents 2

HCID 178418228Bis(cyclopenta-1,4-dien-1-yl(diphenyl)phosphane);dichloropalladium;iron(2+)Catalyst2×HCID 6228DimethylformamideSolvent

Conditions

Temperature
90 °C

Procedure

To 2-(2-bromobenzyl)-N-(cyanomethyl)-4-methylpentanamide (260 mg, 0.805 mmol) and 4-[4-(tert-butoxycarbonyl)-1-piperazinyl]phenylboronic acid (275 mg, 0.886 mmol) in DMF (10 mL) under dry nitrogen was added aqueous sodium carbonate (2 M, 1.2 mL, 2.42 mmol) followed by the catalyst PdCl2(dppf) (25 mg, 0.025 mmol). The reaction was heated to 90° C. for 0.5 hours and more PdCl2(dppf) (25 mg, 0.025 mmol) was added and the reaction mixture was heated for another 4 hours. Water was added and the product extracted with ether (2×), dried over Na2SO4, concentrated in vacuo, and purified by flash chromatography over silica gel (EtOAc/Hex, 35/65) to afford tert-butyl 4-[2′-(2-{[(cyanomethyl)amino]carbonyl}-4-methylpentyl)[1,1 ′-biphenyl]-4-yl]-1-piperazinecarboxylate.

Workup

  1. temperaturethe reaction mixture was heated for another 4 hours
  2. extractionthe product extracted with ether (2×)
  3. dry with materialdried over Na2SO4
  4. concentrationconcentrated in vacuo
  5. custompurified by flash chromatography over silica gel (EtOAc/Hex, 35/65)

Sources & evidence

ORD record
ord-7a6f68e372b1441dbc2a21c8b365f9e8
Source dataset
uspto-grants-2006_03
Patent number
US07012075B2

Reaction notes

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