Potassium Carbonate → Ethyl 4-[15-(trifluoromethyl)pentadecylamino]cinnamate

HRID 1659945Notes

Reaction equation

[NH2:1][C:2]1[CH:14]=[CH:13][C:5]([CH:6]=[CH:7][C:8]([O:10][CH2:11][CH3:12])=[O:9])=[CH:4][CH:3]=1.[F:15][C:16]([F:34])([F:33])[CH2:17][CH2:18][CH2:19][CH2:20][CH2:21][CH2:22][CH2:23][CH2:24][CH2:25][CH2:26][CH2:27][CH2:28][CH2:29][CH2:30][CH2:31]Br.C(=O)([O-])[O-].[K+].[K+]>CN(C)P(N(C)C)(N(C)C)=O.O>[F:15][C:16]([F:33])([F:34])[CH2:17][CH2:18][CH2:19][CH2:20][CH2:21][CH2:22][CH2:23][CH2:24][CH2:25][CH2:26][CH2:27][CH2:28][CH2:29][CH2:30][CH2:31][NH:1][C:2]1[CH:3]=[CH:4][C:5]([CH:6]=[CH:7][C:8]([O:10][CH2:11][CH3:12])=[O:9])=[CH:13][CH:14]=1

Participants

Conditions

Temperature: 60 °C

Procedure

A mixture of ethyl 4-aminocinnamate, one equivalent of 15-(trifluoromethyl)pentadecyl bromide and one equivalent of anhydrous potassium carbonate in hexamethylphosphoramide is heated for 20 hours at 60° C. The mixture is then cooled, diluted with water and extracted with ether. The combined ether extracts are dried, filtered and evaporated to provide ethyl 4-[15-(trifluoromethyl)pentadecylamino]cinnamate. The ester is hydrolyzed with sodium hydroxide in a 1:9 water:ethanol solution at steam bath temperatures for 10 hours. The hot solution is then acidified with acetic acid, cooled and filtered and the solid is washed with water. Recrystallization from chloroform yields the product as a white solid.

Workup

temperatureThe mixture is then cooled
extractionextracted with ether
dry with materialThe combined ether extracts are dried
filtrationfiltered
customevaporated

Sources & evidence

ORD record: ord-2167604e3bba46548898fc1c4a8d286d
Source dataset: uspto-grants-1981_12
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US04305959

Reaction notes

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