Artificial Genetic Systems: Exploiting the “Aromaticity” Formalism To Improve the Tautomeric Ratio for Isoguanosine Derivatives
摘要:
The tautomerism of 2'-deoxy-7-deaza-isoguanosine (2) was studied and compared to that of 2'-deoxyisoguanosine (1). The fixed N-1-methyl (8) and O-methyl (4) derivatives were synthesized to represent the pure extremes of each tautomer. The replacement of the imidazole ring in 1 with a pyrrole ring in 2 makes the keto form in the latter more favored by 2 orders of magnitude (K-TAUT for 2 approximate to 10(3), as opposed to K-TAUT for 1 approximate to 10).
Artificial Genetic Systems: Exploiting the “Aromaticity” Formalism To Improve the Tautomeric Ratio for Isoguanosine Derivatives
摘要:
The tautomerism of 2'-deoxy-7-deaza-isoguanosine (2) was studied and compared to that of 2'-deoxyisoguanosine (1). The fixed N-1-methyl (8) and O-methyl (4) derivatives were synthesized to represent the pure extremes of each tautomer. The replacement of the imidazole ring in 1 with a pyrrole ring in 2 makes the keto form in the latter more favored by 2 orders of magnitude (K-TAUT for 2 approximate to 10(3), as opposed to K-TAUT for 1 approximate to 10).
Artificial Genetic Systems: Exploiting the “Aromaticity” Formalism To Improve the Tautomeric Ratio for Isoguanosine Derivatives
作者:Theodore A. Martinot、Steven A. Benner
DOI:10.1021/jo0497959
日期:2004.5.1
The tautomerism of 2'-deoxy-7-deaza-isoguanosine (2) was studied and compared to that of 2'-deoxyisoguanosine (1). The fixed N-1-methyl (8) and O-methyl (4) derivatives were synthesized to represent the pure extremes of each tautomer. The replacement of the imidazole ring in 1 with a pyrrole ring in 2 makes the keto form in the latter more favored by 2 orders of magnitude (K-TAUT for 2 approximate to 10(3), as opposed to K-TAUT for 1 approximate to 10).