Triethylamine → N-ethoxalyl-N-(2-phthalimido)ethyl-4-(2,2,3,3-tetrafluoropropoxy)aniline

HRID 1077901Notes

Reaction equation

[C:1]1(=[O:28])[N:5]([CH2:6][CH2:7][NH:8][C:9]2[CH:14]=[CH:13][C:12]([O:15][CH2:16][C:17]([F:22])([F:21])[CH:18]([F:20])[F:19])=[CH:11][CH:10]=2)[C:4](=[O:23])[C:3]2=[CH:24][CH:25]=[CH:26][CH:27]=[C:2]12.C(N(CC)CC)C.Cl[C:37](=[O:43])[C:38]([O:40][CH2:41][CH3:42])=[O:39]>ClCCl>[C:37]([N:8]([CH2:7][CH2:6][N:5]1[C:4](=[O:23])[C:3]2=[CH:24][CH:25]=[CH:26][CH:27]=[C:2]2[C:1]1=[O:28])[C:9]1[CH:10]=[CH:11][C:12]([O:15][CH2:16][C:17]([F:22])([F:21])[CH:18]([F:19])[F:20])=[CH:13][CH:14]=1)([C:38]([O:40][CH2:41][CH3:42])=[O:39])=[O:43]

Participants

Conditions

Temperature: -40 °C

Procedure

To the mixture of the obtained N-(2-phthalimido)ethyl-4-(2,2,3,3-tetrafluoropropoxy)aniline (3.2 g), triethylamine (1.2 ml) and dichloromethane (60 ml), was added dropwise a solution of ethyl chloroglyoxylate (0.9 ml) in dichloromethane (10 ml) at -65° C. The reaction solution was stirred for 1 hour at -40° C., and then ice-water (50 ml) was added thereto to fractionate. The dichloromethane layer was washed with water and dried over anhydrous magnesium sulfate. The solvent was distilled off under reduced pressure. The residue was recrystallized from ethyl acetate-hexane to give N-ethoxalyl-N-(2-phthalimido)ethyl-4-(2,2,3,3-tetrafluoropropoxy)aniline (3.1 g) as colorless powdery crystals.

Workup

washThe dichloromethane layer was washed with water
dry with materialdried over anhydrous magnesium sulfate
distillationThe solvent was distilled off under reduced pressure
customThe residue was recrystallized from ethyl acetate-hexane

Sources & evidence

ORD record: ord-b95d4634d2204752abf51f73a4d1fd28
Source dataset: uspto-grants-1996_08
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US05545652

Reaction notes

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