Ethylene Glycol → 1-(2-Naphthyl)cyclopropanecarboxylic acid

HRID 969168

Reaktionsgleichung

[OH-:1].[Na+].[CH:3]1[C:12]2[C:7](=[CH:8][CH:9]=[CH:10][CH:11]=2)[CH:6]=[CH:5][C:4]=1CC#N.Br[CH2:17][CH2:18]Cl.[CH2:20]([OH:23])[CH2:21]O>[Cl-].C([N+](CC)(CC)CC)C1C=CC=CC=1>[CH:11]1[C:12]2[C:7](=[CH:6][CH:5]=[CH:4][CH:3]=2)[CH:8]=[CH:9][C:10]=1[C:21]1([C:20]([OH:23])=[O:1])[CH2:18][CH2:17]1

Komponenten

Reaktionsbedingungen

Temperatur: 100 °C

Versuchsvorschrift

Sodium hydroxide(50% aqueous solution, 3.20 g, 0.0552 mol) was added to a mixture of 2-naphthylacetonitrile (0.913 g, 0.00546 mol), benzyltriethylammonium chloride (0.09 g, 0.0004 mol), and 1-bromo-2-chloro-ethane (1.58 g, 0.0110 mol) at 50 celsius for 5 h. Then 1,2-ethanediol (10.0 mL, 0.179 mol) was added and the mixture was heated at 100° C. overnight. The mixture was poured into ice-water (30 mL) and was extracted with ethyl ether (2×10 mL). The aqueous phase was acidified (pH=2) with 1N HCl and was extracted with ethyl acetate (4×15 mL). The combined organic phase was washed with brine (10 mL), dried over Na2SO4, filtered, and concentrated under reduced pressure. The residue was the desired product, which was directly used in next step reaction without further purification.

Aufarbeitung

extractionwas extracted with ethyl ether (2×10 mL)
extractionwas extracted with ethyl acetate (4×15 mL)
washThe combined organic phase was washed with brine (10 mL)
dry with materialdried over Na2SO4
filtrationfiltered
concentrationconcentrated under reduced pressure
customwas directly used in next step reaction without further purification

Quellen und Nachweise

ORD-Eintrag: ord-b0c9111bbde745dfa1a2ece54dd7fb32
Quelldatensatz: uspto-grants-2007_12
DOI: 10.6084/m9.figshare.5104873.v1
Patentnummer: US07304081B2

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