Regiochemistry in the Pd-Mediated Coupling between 6,8-Dihalopurines and Organometallic Reagents.
摘要:
The regiochemistry in the Pd-mediated coupling between 6,8-dihalopurines and organometallic reagents has been examined. When 6,8-dichloropurines were reacted. highly selective coupling in the purine 6-position was obtained and the regiochemical outcome was completely reversed when a better leaving group (Br or I) was introduced at C-8.