Triphenylphosphine → HCID 69152362, compound

HRID 1744113Notes

Reaction equation

HRID 1744113 reaction equation
[Br:1][C:2]1[C:3]([NH:8][C:9](=[O:16])[O:10][CH2:11][C:12]([Cl:15])([Cl:14])[Cl:13])=[N:4][N:5]([CH3:7])[CH:6]=1.O[CH:18]([CH2:31][CH:32]([CH3:34])[CH3:33])[C:19]([O:21][CH2:22][C:23]1[CH:28]=[CH:27][C:26]([O:29][CH3:30])=[CH:25][CH:24]=1)=[O:20].C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.N(C(OC(C)C)=O)=NC(OC(C)C)=O>CN(C=O)C.O>[Br:1][C:2]1[C:3]([N:8]([C:9]([O:10][CH2:11][C:12]([Cl:14])([Cl:13])[Cl:15])=[O:16])[C@H:18]([C:19]([O:21][CH2:22][C:23]2[CH:24]=[CH:25][C:26]([O:29][CH3:30])=[CH:27][CH:28]=2)=[O:20])[CH2:31][CH:32]([CH3:34])[CH3:33])=[N:4][N:5]([CH3:7])[CH:6]=1

Participants

7

Reactant 4

HCID 11776TriphenylphosphineHCID 75555Diisopropyl diazene-1,2-dicarboxylateHCID 222360714-Methoxybenzyl 2-hydroxy-4-methylpentanoateHCID 691521582,2,2-trichloroethyl 4-bromo-1-methyl-1H-pyrazol-3-ylcarbamate

Product 1

HCID 69152362HCID 69152362, compound

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6228DimethylformamideSolvent

Procedure

To 2,2,2-trichloroethyl 4-bromo-1-methyl-1H-pyrazol-3-ylcarbamate (2.402 g, 6.83 mmol), 4-methoxybenzyl 2-hydroxy-4-methylpentanoate (3.45 g, 13.67 mmol) and triphenyl phosphine (3.58 g, 13.67 mmol) in dry DMF (50 mL) under dry nitrogen was added dropwise diisopropyl azodicarboxylate (2.7 mL, 13.67 mmol) over 45 minutes and the reaction mixture stirred for 2 days. 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, 2/8) to afford 4-methoxybenzyl N-(4-bromo-1-methyl-1H-pyrazol-3-yl)-N-[(2,2,2-trichloroethoxy)carbonyl]leucinate.

Workup

  1. extractionthe product extracted with ether (2×)
  2. dry with materialdried over Na2SO4
  3. concentrationconcentrated in vacuo
  4. custompurified by flash chromatography over silica gel (EtOAc/Hex, 2/8)

Sources & evidence

ORD record
ord-49fab3b51c5246a0ae8d2109bd67c4b2
Source dataset
uspto-grants-2006_03
Patent number
US07012075B2

Reaction notes

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