Modular Synthesis of Heterocyclic Carbene Precursors
作者:Attila Paczal、Attila C. Bényei、András Kotschy
DOI:10.1021/jo060594+
日期:2006.8.1
N-heterocyclic carbeneprecursors, containing an imidazoline or tetrahydropyrimidine framework, were prepared from ω-chloroalkanoyl chlorides. The sequential attachment of nitrogen nucleophiles and subsequent ring closure gave, depending on the reagents used, either the desired dihydroimidazolium and tetrahydropyrimidinium salts or their parent heterocycles. In this latter case, the second substituent was introduced