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1,4,5,6-tetrahydropyrimidinium halides ligands for Suzuki-Miyaura cross-coupling of unactivated aryl chlorides
(2005) Alici B.; Özdemir I.; Gürbüz N.; Çetinkaya E.; Çetinkaya B.
Four functionalized bis(1,4,5,6-tetrahyropyrimidinium) salts (2a-d) have been prepared and characterized by conventional spectroscopic methods and elemental analyses. A highly effective, easy to handle and environmentally benign process for palladium mediated Suzuki cross-coupling was developed. The in situ prepared three component system Pd(OAc)2 / bis(1,4,5,6-tetrahyropyrimidinium) bromides (2a-d) and Cs2CO 3 catalyses quantitatively the Suzuki cross-coupling of deactivated aryl chloride.
Synthesis of Tetraaminoalkenes containing the Reduced Pyrimidine Skeleton and the X-ray Molecular Structure of 1,1?-Ethylene-3,3?-dibenzylbi(hexahydropyrimidin-2-ylidene)
(1996) Alici B.; Çetinkaya E.; Çetinkaya B.; Ülkü D.; Tahir M.N.
Deprotonation of a 1,1?-bridged bis(1,3-dialkyl-1,4,5,6-tetrahydropyrimidinium) diiodide with NaH gives in high yield a tetraaminoalkene 4, whereas the corresponding non-bridged tetrahydropyrimidinium iodide reacts with NaH only in the presence of KOBut; the title bridged tetraaminoalkene 4f was structurally characterized by single-crystal X-ray diffraction.