A Chiral Pool Strategy for the Synthesis of Enantiopure Hydroxymethyl-Substituted Pyridine Derivatives
作者:Christian Eidamshaus、Hans-Ulrich Reissig
DOI:10.1002/ejoc.201100681
日期:2011.10
A simple procedure for the synthesis of enantiopure hydroxymethyl-substituted pyridine derivatives is presented. The developed method is based on TMSOTf-promoted cyclocondensations of β-ketoenamides, leading to differently substituted 4-hydroxypyridine/4-pyridone derivatives. The required β-ketoenamides were prepared by acylation ofeasily available enamino ketones with suitably protected enantiopure
The three components, ammonia, acetylacetone, and prolinederivatives are starting materials for β-ketoenamides. Smooth subsequent transformations generate a library of enantiopurepyridine and pyrimidinederivatives.