摘要:
The ortho-alkylation of Boc-protected aminopyridines with alpha,omega-dihaloalkanes followed by in situ cyclisation, resulted in the corresponding annulated pyridine derivatives in good to excellent yields. The effect of the alkylating and chelating agents, the transmetallation additives and the directing group was examined. (C) 2004 Elsevier Ltd. All rights reserved.