Cesium carbonate → Methyl 4-{[3-(4-chlorophenyl)-5-oxo-4-(3,3,3-trifluoro-2-hydroxypropyl)-4,5-dihydro-1H-1,2,4-triazol-1-yl]methyl}benzoate

HRID 536543Notes

Reaction equation

[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]2[N:9]([CH2:14][CH:15]([OH:20])[C:16]([F:19])([F:18])[F:17])[C:10](=[O:13])[NH:11][N:12]=2)=[CH:4][CH:3]=1.C(=O)([O-])[O-].[Cs+].[Cs+].Br[CH2:28][C:29]1[CH:38]=[CH:37][C:32]([C:33]([O:35][CH3:36])=[O:34])=[CH:31][CH:30]=1>CC(C)=O.O>[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]2[N:9]([CH2:14][CH:15]([OH:20])[C:16]([F:18])([F:19])[F:17])[C:10](=[O:13])[N:11]([CH2:28][C:29]3[CH:38]=[CH:37][C:32]([C:33]([O:35][CH3:36])=[O:34])=[CH:31][CH:30]=3)[N:12]=2)=[CH:4][CH:3]=1

Participants

Conditions

Temperature: 50 °C

Procedure

An amount of 305 mg (0.99 mmol) of the compound from Example 19A and 355 mg (1.09 mmol) of caesium carbonate were suspended in 10 ml of acetone and admixed with 227 mg (0.99 mmol) of methyl 4-(bromomethyl)benzoate. The mixture was stirred at 50° C. for 3 h. The suspension was diluted with water. It was extracted with twice 15 ml of ethyl acetate. The combined organic phases were dried over sodium sulphate and freed from the solvent on a rotary evaporator. Purification by flash chromatography over silica gel with elution with cyclohexane/ethyl acetate (gradient 10:1→2:1) gave 284 mg (63% of theory) of the target compound.

Workup

extractionIt was extracted with twice 15 ml of ethyl acetate
dry with materialThe combined organic phases were dried over sodium sulphate
customfreed from the solvent on a rotary evaporator
customPurification by flash chromatography over silica gel
washwith elution with cyclohexane/ethyl acetate (gradient 10:1→2:1)
customgave 284 mg (63% of theory) of the target compound

Sources & evidence

ORD record: ord-0664335491bd4ea48bfc07c6ca04e7d7
Source dataset: uspto-grants-2014_10
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08859601B2

Reaction notes

Loading…