Synthesis and EPR Studies of 2-N-tert-Butylaminoxylpurine Derivatives
摘要:
2'-Deoxyribofuranosylpurine derivatives bearing an N-tert-butylaminoxyl group (1a and 2a) were synthesized via oxidation of the corresponding N-tert-butylhydroxylamines (1b and 2b), which were synthesized by lithiation of 8-TIPS-6-chloropurine (3) at the 2-position and the following reaction with 2-methyl-2-nitrosopropane. Treatment of 1b and 2b with 1 equiv of NalO(4) resulted in efficient formation of la and 2a. which were isolated as purple and red solids, respectively. The EPR spectra of la showed pH dependency due to structural change of purine moiety.
Synthesis and EPR Studies of 2-N-tert-Butylaminoxylpurine Derivatives
摘要:
2'-Deoxyribofuranosylpurine derivatives bearing an N-tert-butylaminoxyl group (1a and 2a) were synthesized via oxidation of the corresponding N-tert-butylhydroxylamines (1b and 2b), which were synthesized by lithiation of 8-TIPS-6-chloropurine (3) at the 2-position and the following reaction with 2-methyl-2-nitrosopropane. Treatment of 1b and 2b with 1 equiv of NalO(4) resulted in efficient formation of la and 2a. which were isolated as purple and red solids, respectively. The EPR spectra of la showed pH dependency due to structural change of purine moiety.
2'-Deoxyribofuranosylpurine derivatives bearing an N-tert-butylaminoxyl group (1a and 2a) were synthesized via oxidation of the corresponding N-tert-butylhydroxylamines (1b and 2b), which were synthesized by lithiation of 8-TIPS-6-chloropurine (3) at the 2-position and the following reaction with 2-methyl-2-nitrosopropane. Treatment of 1b and 2b with 1 equiv of NalO(4) resulted in efficient formation of la and 2a. which were isolated as purple and red solids, respectively. The EPR spectra of la showed pH dependency due to structural change of purine moiety.