Palladium-Catalyzed Cross-Coupling between 8-Substituted 6-Thiophenylpurines and Boronic Acids
摘要:
A palladium(II)-catalyzed, copper(I)-mediated Liebeskind-Srogl cross-coupling for the C-6 arylation/alkenylation on purine scaffold is reported. Various boronic acids reacted readily with 8-substituted 6-thiophenylpurines.
Regiochemistry in the Pd-Mediated Coupling between 6,8-Dihalopurines and Organometallic Reagents.
作者:Jens M. J. Nolsøe、Lise-Lotte Gundersen、Frode Rise、Uffe Anthoni、Per H. Nielsen、Carsten Christophersen、Hong-Gen Wang、Xin-Kan Yao、Hong-Gen Wang、J. -P. Tuchagues、Mattias Ögren
DOI:10.3891/acta.chem.scand.53-0366
日期:——
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.