Sodium Hydroxide → 1-Naphthylglycine

In 5 ml of THF, 500 mg of 1-naphthylamine was added, then 168 mg of sodium hydride (60% in oil) was added and the resultant mixture was stirred for 30 min under ice cooling. To the reaction mixture, 0.46 ml of ethyl bromoacetate was added and the mixture was refluxed for 5 hr. The reaction mixture was evaporated under reduced pressure and the resultant residue was re-dissolved in ethyl acetate. The obtained solution was washed with 5% sodium hydrogencarbonate aqueous solution and saturated sodium chloride aqueous solution, successively, and dried over anhydrous sodium sulfate. The dried solution was evaporated. under reduced pressure and subjected to a silica gel column chromatography (n-hexane:ethyl acetate=10:1) to give 720 mg of ethyl 1-naphthylaminoacetate. In 10 ml of ethanol, 460 mg of the ester was dissolved, 3.78 ml of 1N-NaOH aqueous solution was added and the resultant mixture was stirred for 1 hr. The reaction mixture was evaporated under reduced pressure, neutralized by the addition of 1N-HCl and extracted with ethyl acetate. The extract was washed with saturated sodium chloride aqueous solution and dried over anhydrous sodium sulfate. The dried solution was evaporated under reduced pressure and crystallized by the treatment with ether to give 188 mg of the title compound.

1. customThe reaction mixture was evaporated under reduced pressure
2. additionneutralized by the addition of 1N-HCl
3. extractionextracted with ethyl acetate
4. washThe extract was washed with saturated sodium chloride aqueous solution
5. dry with materialdried over anhydrous sodium sulfate
6. customThe dried solution was evaporated under reduced pressure
7. customcrystallized by the treatment with ether

ORDレコード

ord-221b16c84c3e494f8a059abfaf41b302

出典データセット

uspto-grants-2001_11

DOI

10.6084/m9.figshare.5104873.v1

特許番号

US06313094B1