Potassium Carbonate → 1-[4-(4-fluorophenylmethoxy)-2-fluorophenyl]-1,4-dihydro-4-(3-fluoropropyl)-5H-tetrazol-5-one

HRID 2225396Notes

Reaction equation

[F:1][C:2]1[CH:7]=[CH:6][C:5]([CH2:8][O:9][C:10]2[CH:15]=[CH:14][C:13]([N:16]3[C:20](=[O:21])[NH:19][N:18]=[N:17]3)=[C:12]([F:22])[CH:11]=2)=[CH:4][CH:3]=1.Br[CH2:24][CH2:25][CH2:26][F:27].C(=O)([O-])[O-].[K+].[K+]>CN(C)C=O>[F:1][C:2]1[CH:7]=[CH:6][C:5]([CH2:8][O:9][C:10]2[CH:15]=[CH:14][C:13]([N:16]3[C:20](=[O:21])[N:19]([CH2:24][CH2:25][CH2:26][F:27])[N:18]=[N:17]3)=[C:12]([F:22])[CH:11]=2)=[CH:4][CH:3]=1

Participants

Conditions

Temperature: 70 °C

Procedure

A mixture of 7.0 g (0.023 mole) of 1-[4-(4-fluorophenylmethoxy)-2-fluorophenyl]-1,4-dihydro-5H-tetrazol-5one, 4.23 g (0.030 mole) of 1-bromo-3-fluoropropane, and 4.14 g (0.030 mole) of anhydrous potassium carbonate in 60 mL of N,N-dimethylformamide was heated at 70° C. for approximately seventeen hours. The mixture was allowed to cool to room temperature before being poured over ice. The solid that formed was removed by filtration and dried. This solid was then placed on a silica gel column and eluted with with methylene chloride. The product-containing fractions were combined and the solvents evaporated under reduced pressure, leaving 6.35 g of 1-[4-(4-fluorophenylmethoxy)-2-fluorophenyl]-1,4-dihydro-4-(3-fluoropropyl)-5H-tetrazol-5-one, m.p. 86°-88° C.

Workup

temperatureto cool to room temperature
additionbefore being poured over ice
customThe solid that formed
customwas removed by filtration
customdried
washeluted with with methylene chloride
customthe solvents evaporated under reduced pressure

Sources & evidence

ORD record: ord-8d1da54458254adf8d138228ec3b7f7d
Source dataset: uspto-grants-1994_09
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US05344812

Reaction notes

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