A Concise Synthesis of Alkoxy-Substituted Pyrimidine Derivatives Based upon a Three-Component Access to Functionalized Enamides
作者:Hans-Ulrich Reissig、Tilman Lechel、Sophia Möhl
DOI:10.1055/s-0028-1088220
日期:2009.4
Substituted enamides were prepared by a three-component reaction of lithiated alkoxyallenes, nitriles, and carboxylic acids. Their subsequent condensation with ammonium salts provided alkoxy-substituted pyrimidine derivatives. This two-step method is highly flexible with respect to the substitution pattern at C-2 and C-6. The C-4 and C-5 positions can smoothly be functionalized employing either Pd-catalyzed couplings or oxidation methods.