Ja. Linn et al., 1,4-DIAZABICYCLO[2.2.2]OCTANE (DABCO)-CATALYZED HYDROLYSIS AND ALCOHOLYSIS REACTIONS OF 2-AMINO-9-BENZYL-6-CHLORO-9H-PURINE, Journal of the Chemical Society, Chemical Communications, (8), 1994, pp. 913-914
2-Amino-9-benzyl-6-chloro-9H-purine 1 is hydrolysed in refluxing water
in the presence of 1,4-diazabicycle [2.2.2] octane (DABCO) to give 2-
amino-9-benzyl-1,6-dihydro-6-oxo-9H-purine 3; however, 1 reacts with h
ydroxide ion at ambient temp., or an alcohol and potassium carbonate a
t elevated temperatures, in the presence of DABCO to give 3 or 6-alkox
y-2-amino-9-benzyl-9H-purines 4-8, respectively.