反应详情

4.32 g (52 mmol) of N,N-dimethyl-2-propynylamine, 32.4 ml (52 mmol) of n-butyllithium as 1.6 M solution in n-hexane and 11.1 g (40 mmol) of 3-methyl-1-(3-oxobutyl)-7-propylxanthine were reacted in tetrahydrofuran and worked up in analogy to Example 1C2), but using chloroform in place of dichloromethane as extractant.