Dimethylformamide → ethyl (2E)-3-{1-ethyl-3-[(4-{[2-(2-furyl)-5-methyl-1,3-oxazol-4-yl]methoxy}-3-methoxybenzyl)oxy]-1H-pyrazol-4-yl}-2-propenoate

HRID 2221865Notes

Reaction equation

HRID 2221865 reaction equation
[CH2:1]([N:3]1[CH:7]=[C:6]([CH:8]=O)[C:5]([O:10][CH2:11][C:12]2[CH:17]=[CH:16][C:15]([O:18][CH2:19][C:20]3[N:21]=[C:22]([C:26]4[O:27][CH:28]=[CH:29][CH:30]=4)[O:23][C:24]=3[CH3:25])=[C:14]([O:31][CH3:32])[CH:13]=2)=[N:4]1)[CH3:2].C(OP([CH2:41][C:42]([O:44][CH2:45][CH3:46])=[O:43])(OCC)=O)C.CN(C)C=O.[H-].[Na+]>O>[CH2:1]([N:3]1[CH:7]=[C:6](/[CH:8]=[CH:41]/[C:42]([O:44][CH2:45][CH3:46])=[O:43])[C:5]([O:10][CH2:11][C:12]2[CH:17]=[CH:16][C:15]([O:18][CH2:19][C:20]3[N:21]=[C:22]([C:26]4[O:27][CH:28]=[CH:29][CH:30]=4)[O:23][C:24]=3[CH3:25])=[C:14]([O:31][CH3:32])[CH:13]=2)=[N:4]1)[CH3:2]

Participants

6

Reactant 4

HCID 6228DimethylformamideHCID 13345Triethyl phosphonoacetateHCID 24758Sodium hydrideHCID 866058211-ethyl-3-[(4-{[2-(2-furyl)-5-methyl-1,3-oxazol-4-yl]methoxy}-3-methoxybenzyl)oxy]-1H-pyrazole-4-carbaldehyde

Product 1

HCID 86605820ethyl (2E)-3-{1-ethyl-3-[(4-{[2-(2-furyl)-5-methyl-1,3-oxazol-4-yl]methoxy}-3-methoxybenzyl)oxy]-1H-pyrazol-4-yl}-2-propenoateYield 91%

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

To a mixture of 1-ethyl-3-[(4-{[2-(2-furyl)-5-methyl-1,3-oxazol-4-yl]methoxy}-3-methoxybenzyl)oxy]-1H-pyrazole-4-carbaldehyde (0.50 g), ethyl diethylphosphonoacetate (0.27 g) and N,N-dimethylformamide (10 mL) was added sodium hydride (60% in oil, 0.05 g) at room temperature, and the mixture was stirred at the same temperature for 15 hrs. Water was poured into the reaction mixture, and the precipitated crystals were collected by filtration to give ethyl (2E)-3-{1-ethyl-3-[(4-{[2-(2-furyl)-5-methyl-1,3-oxazol-4-yl]methoxy}-3-methoxybenzyl)oxy]-1H-pyrazol-4-yl}-2-propenoate as colorless crystals (0.51 g, yield 91%). Recrystallization from ethyl acetate-hexane gave colorless prism crystals. melting point: 149-150° C.

Workup

  1. filtrationthe precipitated crystals were collected by filtration

Sources & evidence

ORD record
ord-731b318de60746029531d0366b8e05f5
Source dataset
uspto-grants-2008_05
Patent number
US07368578B2

Reaction notes

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