Five-Membered Ring Heterocyclic Compounds as Nitrification Inhibitors

New five-membered ring heterocyclic compounds with antibacterial and antifungal activity

M. Pitucha*, A. Pachuta-Stec and A.A. Kaczor* 1 Medical University of Lublin, Department of Organic Chemistry, Faculty of Pharmacy with Division of Medical Analytics, Medical University of Lublin, 4A Chodzki St., PL-20093 Lublin, Poland 2 Medical University of Lublin, Department of Synthesis and Chemical Technology of Pharmaceutical Chemistry, Faculty of Pharmacy with Division of Medical Analyt...

Construction of Five-Membered Heterocyclic Compounds via Radical Cyclization

Singlet-Triplet Energy Splitting of Divalent Five-Membered Ring NI2C2H2C (M = N,P, As and Sb)

In recent work, thermal energy gaps. AE, it °PUPS gas, Ana; Gibbs free energy gaps, AG.,, between singlet(s) and triplet 0) states of 5.12C3H2C, I m (4 N. P. As and Sb) were calculated and compared with thoseanalogues. MC2113C, (M= CIL N. P. As and Sb) at B3LYIE6-311-NG" level of theory. Our itself showedthat Gibbs free energy gaps. AG, for l uu and 1 p are less than IS and I's, respectively. I...

Facile formation of five-membered N-heterocyclic zirconacycloallenoids.

The reaction of η(2)-iminozirconocene chloride complexes with trimethylsilylethynyl lithium leads to rapid C-C coupling at room temperature to yield the corresponding five-membered aza-zirconacycloallenoids. Such compounds were also obtained by trapping of in situ generated zirconocene with alkynyl imines.

Palladium-Catalyzed Amination of Unprotected Five-Membered Heterocyclic Bromides

An efficient method for the palladium-catalyzed amination of unprotected bromoimidazoles and bromopyrazoles is presented. The transformation is facilitated by the use of our newly developed Pd precatalyst based on the bulky biarylphosphine ligand tBuBrettPhos (L4). The mild reaction conditions employed allow for the preparation of a broad scope of aminoimidazoles and aminopyrazoles in moderate ...