Jl. Zhou et al., N-2-acetyl-O-6-(2-(p-nitrophenyl)ethyl)guanine: A convenient building block for the synthesis of 9-substituted guanine derivatives, SYN COMMUN, 29(17), 1999, pp. 3003-3009
Readily accessible N-2-acetyl-O-6-(2-(p-nitrophenyl)ethyl)guan can undergo
Mitsunobu reactions with either a primary or secondary alcohol to generate
guanine derivatives. X-ray data indicates that only the desired 9-subsitute
d derivatives of guanine are formed.