Potassium Carbonate → Benzyl 5-(4,6-Dimethoxy-1,3,5-triazin-2-yl)oxy-2-methyl-3-methoxycarbonylbenzofuran-4-carboxylate

HRID 964522Notes

Reaction equation

[OH:1][C:2]1[C:15]([C:16]([O:18][CH2:19][C:20]2[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=2)=[O:17])=[C:6]2[C:7]([C:11]([O:13][CH3:14])=[O:12])=[C:8]([CH3:10])[O:9][C:5]2=[CH:4][CH:3]=1.[CH3:26][O:27][C:28]1[N:33]=[C:32]([O:34][CH3:35])[N:31]=[C:30](S(C)(=O)=O)[N:29]=1.C(=O)([O-])[O-].[K+].[K+]>CN(C)C=O>[CH3:35][O:34][C:32]1[N:33]=[C:28]([O:27][CH3:26])[N:29]=[C:30]([O:1][C:2]2[C:15]([C:16]([O:18][CH2:19][C:20]3[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=3)=[O:17])=[C:6]3[C:7]([C:11]([O:13][CH3:14])=[O:12])=[C:8]([CH3:10])[O:9][C:5]3=[CH:4][CH:3]=2)[N:31]=1

Participants

Conditions

Temperature: 70 °C

Procedure

A mixture comprising 2 g of benzyl 5-hydroxy-2-methyl-3-methoxycarbonylbenzofuran-4-carboxylate, 1 g of 4,6-dimethoxy-2-methylsulfonyl-1,3,5-triazine and 1 g of potassium carbonate in 20 ml of N,N-dimethylformamide, was heated and stirred at 70° C. for two hours. The mixture was returned to room temperature, poured into ice water and extracted with ethyl acetate. The organic layer was washed with water and then dried over anhydrous sodium sulfate. Then, it was concentrated under reduced pressure, and the obtained solid was thoroughly washed with ethanol to obtain 2.4 g (yield: 86%) of the desired compound.

Workup

temperaturewas heated
customwas returned to room temperature
extractionextracted with ethyl acetate
washThe organic layer was washed with water
dry with materialdried over anhydrous sodium sulfate
concentrationThen, it was concentrated under reduced pressure
washthe obtained solid was thoroughly washed with ethanol

Sources & evidence

ORD record: ord-f38a1d885af643f796c93753142abc14
Source dataset: uspto-grants-1998_06
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US05770544

Reaction notes

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