Potassium Carbonate → phenyl 3-tert-butyl-1-phenyl-1H-pyrazol-5-ylcarbamate

HRID 871505Notes

Reaction equation

HRID 871505 reaction equation
[C:1]([C:5]1[CH:9]=[C:8]([NH2:10])[N:7]([C:11]2[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=2)[N:6]=1)([CH3:4])([CH3:3])[CH3:2].Cl[C:18]([O:20][C:21]1[CH:26]=[CH:25][CH:24]=[CH:23][CH:22]=1)=[O:19].C([O-])([O-])=O.[K+].[K+]>C1COCC1>[C:1]([C:5]1[CH:9]=[C:8]([NH:10][C:18](=[O:19])[O:20][C:21]2[CH:26]=[CH:25][CH:24]=[CH:23][CH:22]=2)[N:7]([C:11]2[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=2)[N:6]=1)([CH3:4])([CH3:2])[CH3:3]

Participants

5

Reactant 3

HCID 11430Potassium CarbonateHCID 15891Phenyl chloroformateHCID 7706343-tert-butyl-1-phenyl-1H-pyrazol-5-amine

Product 1

HCID 46196894phenyl 3-tert-butyl-1-phenyl-1H-pyrazol-5-ylcarbamateYield 42%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

Using the procedure described in Example 161C, 3-tert-butyl-1-phenyl-1H-pyrazol-5-amine (2.00 g, 9.3 mmol) was reacted with phenyl chloroformate (1.6 g, 10.2 mmol) and K2CO3 (1.7 g, 12.1 mmol) in THF (20 mL), which was purified by silica gel chromatography (0-50% EtOAc/hexane) to afford phenyl 3-tert-butyl-1-phenyl-1H-pyrazol-5-ylcarbamate as solid (1.3 g, 42%). 1H NMR (300 MHz, DMSO-d6) δ 10.0 (s, 1H), 7.55 (m, 4H), 7.40 (m, 3H), 7.08-7.23 (m, 3H), 6.37 (s, 1H), 1.3 (s, 9H); LC-MS (ESI) m/z 336 (M+H)+.

Workup

  1. customwas purified by silica gel chromatography (0-50% EtOAc/hexane)

Sources & evidence

ORD record
ord-d2a5234158b3425b862f3e5706b726bb
Source dataset
uspto-grants-2015_03
Patent number
US08969587B2

Reaction notes

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