Реакция #470381

Уравнение реакции

L-lysine methyl ester dihydrochloride

triethylamine

benzyloxy acetyl chloride

→

2

Выход 31.8%

2,6-Bis-(2-benzyloxy-acetylamino)-hexanoic acid methyl ester

Выход 31.8%

Растворители

ethyl acetate

Условия реакции

Обработка

1. 1
   ФильтрацияThe solids were filtered off
2. 2
   ПромывкаThe organic phase was washed with 5% sodium bicarbonate (2×100 mL), water (2×100 mL)
3. 3
   Сушкаdried over sodium sulphate
4. 4
   workup.DISTILLATIONdistilled
5. 5
   ДругоеThe crude 2 was purified by column chromatography on silica gel

Методика

To a mixture of L-lysine methyl ester dihydrochloride (50 grams, 214.4 mmol), triethylamine (131 grams, 1.294 moles) in ethyl acetate (750 mL) at room temperature was added benzyloxy acetyl chloride (120 grams, 650.4 mmol) drop wise. The mixture was further stirred at room temperature for 2 hours. The solids were filtered off. The organic phase was washed with 5% sodium bicarbonate (2×100 mL), water (2×100 mL), dried over sodium sulphate and distilled. The crude 2 was purified by column chromatography on silica gel using Benzene: Ethyl acetate (9:1) to get pure 2 (30 grams, 31.8%) as a white powder.

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