Реакция #487548

Уравнение реакции

benzyl (1,2,3,4-tetrahydro-isoquinolin-6-yl)-carbamate

sodium hydrogen carbonate

formalin

sodium triacetoxyborohydride

trifluoroacetate

→

benzyl (2-methyl-1,2,3,4-tetrahydro-isoquinolin-6-yl)-carbamate

Растворители

methanol

acetic acid

Условия реакции

Обработка

1. 1
   workup.STIRRINGthe mixture is stirred for two hours
2. 2
   Экстракцияextracted three times with ethyl acetate
3. 3
   ДругоеThe combined organic phases are dried on sodium sulphate
4. 4
   Другоеevaporated to dryness i.vac

Методика

1.5 g (3.8 mmol) benzyl (1,2,3,4-tetrahydro-isoquinolin-6-yl)-carbamate (as the trifluoroacetate salt) are suspended in 8 ml of methanol and adjusted to pH 6 with acetic acid. 0.6 ml (8.5 mmol) formalin solution (37% in water) are added and the mixture is stirred for 30 minutes at RT. Then a total of 1.8 g (8.5 mmol) sodium triacetoxyborohydride are added batchwise and the mixture is stirred for two hours. The reaction mixture is poured onto sat. sodium hydrogen carbonate solution and extracted three times with ethyl acetate. The combined organic phases are dried on sodium sulphate and evaporated to dryness i.vac.

Источник