反应 #69977

反应方程式

sodium borohydride

4-oxoadamantane-1-carboxylic acid methyl ester

ammonia

→

4-aminoadamantane-1-carboxylic acid methyl ester

溶剂

methanol

methanol

反应条件

后处理

1. 1
   workup.STIRRINGthe reaction medium is stirred for a further 3 h
2. 2
   浓缩After concentrating to dryness under reduced pressure
3. 3
   workup.ADDITIONadding water and ethyl acetate
4. 4
   萃取the aqueous phase is extracted three times in ethyl acetate
5. 5
   干燥dried over magnesium sulphate
6. 6
   浓缩concentrated to dryness
7. 7
   其他The crude product obtained
8. 8
   其他is chromatographed on silica gel, elution

实验过程

5 g of 4-oxoadamantane-1-carboxylic acid methyl ester are placed in 26 ml of methanol under nitrogen. 86 ml of a 7N solution of ammonia in methanol are added. The reaction medium is stirred for 18 h, 4 g of sodium borohydride are then added at 0° C. and the reaction medium is stirred for a further 3 h. After concentrating to dryness under reduced pressure and adding water and ethyl acetate, the aqueous phase is extracted three times in ethyl acetate. The organic phases are combined, dried over magnesium sulphate and concentrated to dryness. The crude product obtained is chromatographed on silica gel, elution being carried out with a gradient of heptane/acetone/methanol/NH4OH solvent from 1/0/0 to 4/5/1/0.1. 1.5 g of 4-aminoadamantane-1-carboxylic acid methyl ester are obtained in the form of a mixture of cis/trans (1/3) isomers.

来源