Convenient synthesis of 2,9-disubstituted guanines mediated by solid-supported reagents
摘要:
A novel application has been developed to separate regioisomers chemoselectively using a solid-supported reagent. An N7/N9 purine regioisomer mixture was purified using aluminum oxide/H+ to provide the N9 isomer selectively as a parallel or high-throughput format (chemoselective high-throughput purification). 2,9-Disubstituted guanines were conveniently prepared by this new method in conjunction with solid-supported reagents. (C) 2000 Elsevier Science Ltd. All rights reserved.
Substituted O6-Benzylguanine Derivatives and Their Inactivation of Human O6-Alkylguanine-DNA Alkyltransferase
作者:Mi Young Chae、Mark G. McDougall、M. Eileen Dolan、Kristin Swenn、Anthony E. Pegg、Robert C. Moschel
DOI:10.1021/jm00029a005
日期:1994.2
Several new O-6-benzylguanine analogs bearing increasingly bulky substituent groups on the benzene ring or at position 9 were tested for their ability to inactivate the human DNA repair protein, O-6-alkylguanine-DNA alkyltransferase. Substitution on the benzene ring was well tolerated although activity varied considerably with structural changes in groups attached to position 9. For this site, activity was preserved with large or small lipophilic groups while introduction of non-carbohydrate polar groups generally reduced activity regardless of their size.