Dikloro [1-(2-metil-2-propenil)-3-(3,4,5-trimetoksibenzil) benzimidazol-2-iliden] piridin paladyum(II) Kompleksinin Sentezi, Yapısal Karakterizasyonu, Suzuki-Miyaura ve Mizoroki-Heck Eşleşme Tepkimelerindeki Katalitik Aktivitesi

Neslihan ŞAHİN
1.211 345

Öz


N-heterosiklik karben-metal kompleksleri katalizör olarak yüksek aktivite göstermektedirler. Yeni katalizörlerin sentezlenmesi ve organik sentez tepkimelerinde kullanılması koordinasyon kimyasının en önemli çalışma alanlarından biridir. Bu çalışmada, ılımlı tepkime koşulları altında, yüksek verimli paladyum katalizli eşleşme tepkimelerini gerçekleştirmek amacıyla, 1-(2-metil-2-propenil)-3-(3,4,5-trimetoksibenzil)benzimidazolyum klorür tuzu (1)  ve bu yeni tuzdan Pd(II)-N-heterosiklik karben kompleksi (NHC) (2) sentezlendi. Elde edilen her iki bileşiğin yapısı elementel analiz, FT-IR, 1H NMR ve 13C NMR spektroskopileri ile karakterize edildi. Daha sonra Pd(II)-NHC (2) kompleksinin Suzuki-Miyaura ve Mizoroki-Heck eşleşme tepkimelerindeki katalitik aktivitesi incelendi. Sentezlenen dikloro[1-(2-metil-2-propenil)-3-(3,4,5-trimetoksibenzil) benzimidazol-2-iliden] piridin paladyum(II) kompleksinin Suzuki-Miyaura eşleşme tepkimesi için su-izopropil alkol karışımında oldukça yüksek aktivite gösterdiği gözlendi.

Anahtar kelimeler


N-heterosiklik karben; Paladyum; Suzuki-Miyaura; Mizoroki-Heck

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Referanslar


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