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.
New 5-Alkoxypyrimidine Derivatives from β-Alkoxy β-Keto Enamides and Ammonium Salts
作者:Tilman Lechel、Hans-Ulrich Reissig
DOI:10.1002/ejoc.201000056
日期:2010.5
pyridinyl nonaflate and a subsequent cyclization led to an efficient access to pyrimidinyl-substituted furo[2,3-c]pyridine derivatives. The C-6 methyl group which is present in all of the prepared pyrimidines can easily be converted into formyl, carboxylic or alkynyl moieties which allow the synthesis of additional pyrimidinederivatives.