Triethylamine → HCID 53708924, Verbindung

Temperatur

80 °C

A mixture of 18.24 g of D-alanine ethyl ester hydrochloride in 60 ml of ethanol was added dropwise to a mixture of 25 ml of triethylamine in 60 ml of ethanol and the resulting mixture was heated to 80° C. The solution obtained was added dropwise at this temperature to a solution of 15 g of 2-chloro-6-nitrobenzyl bromide in 60 ml of ethanol. The mixture was stirred at 80° C. overnight and then evaporated to dryness. The residue was treated with 150 ml of deionised water and extracted twice with 100 ml of methylene chloride. The methylene chloride extracts were washed with water, dried over sodium sulphate and evaporated. The resulting product was purified by chromatography on silica gel with methylene chloride/5% methanol. There were obtained 16 g (93% of theory) of N-(2-chloro-6-nitrobenzyl)-D-alanine ethyl ester; nD25 =1.5247; [α]D =-6.9° (c=1% in ethanol).

1. customThe solution obtained
2. customevaporated to dryness
3. additionThe residue was treated with 150 ml of deionised water
4. extractionextracted twice with 100 ml of methylene chloride
5. washThe methylene chloride extracts were washed with water
6. dry with materialdried over sodium sulphate
7. customevaporated
8. customThe resulting product was purified by chromatography on silica gel with methylene chloride/5% methanol

ORD-Eintrag

ord-8f3631eba64e4d3b959b52004ebbed82

Quelldatensatz

uspto-grants-1981_03

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US04256748