反应详情

26.0 g (87.25 mmoles) of 4-(1-adamantylamino)-2,6-dichloropyrimidine and 39.5 g (261.6 mmoles) of 1-aminoadamantane are dissolved in 200 ml of n-butanol, the reaction mixture is boiled for 75 hours and evaporated. The residue is suspended in 400 ml of ether and filtered. The filtered substance is chromatographed after drying on a silica gel column by using chloroform as eluent. The substance obtained is a mixture of the title isomers. The isomers are separated on a silica gel column by using as eluent a 49:1 mixture of hexane and ethyl acetate. 2,4-Bis(1-adamantylamino)-6-chloropyrimidine is obtained which is recrystallized from hexane to obtain a yield of 21.67 g (60.14%). Its melting point and 1H-NMR are identical to those of the product according to Example 11.

1. customevaporated
2. filtrationfiltered
3. customThe filtered substance is chromatographed
4. customafter drying on a silica gel column
5. customThe substance obtained
6. additiona mixture of the title isomers
7. customThe isomers are separated on a silica gel column
8. additiona 49:1 mixture of hexane and ethyl acetate