Reduction of substituted 1,10-phenanthrolines as a route to rigid chiral benzimidazolylidenes

Vinylic CH Borylation of Cyclic Vinyl Ethers with Bis(pinacolato)diboron Catalyzed by an Iridium(I)‐dtbpy Complex

“…2,2′‐Bipyridine, 4,4′‐dimethyl‐2,2′‐bipyridine, 5,5′‐dimethyl‐2,2′‐bipyridine, 6,6′‐dimethyl‐2,2′‐bipyridine, 4,4′‐di‐ tert ‐butyl‐2,2′‐bipyridine, and 2,9‐dimethylphenanthroline were commercially available. 3,3′‐Dimethyl‐2,2′‐bipyridine,32a 4,4′‐dimethoxy‐2,2′‐bipyridine,32b 4,4′‐dichloro‐2,2′‐bipyridine,32b 4,4′‐dinitro‐2,2′‐bipyridine,32c 2‐methyl‐1,10‐phenanthroline,32d 2‐isopropyl‐1,10‐phenanthroline,32d 2‐ tert ‐butyl‐1,10‐phenanthroline,32d and 2,9‐diisopropyl‐1,10‐phenanthroline12c were prepared by the literature procedure. Hexane, octane, and dioxane were distilled from sodium, and DMF was distilled from molecular sieves before use.…”

Synthesis and properties of heteroaromatic carbenes of the imidazole and triazole series and their fused analogues

“…Using the chloro-substituted derivative 30С and an appropriate salt the ruthenіum complex 30G was synthesized, it being nearest to the target pentalene-carbene in terms of its structure. 146 The syntheses of salts and complexes of the fused derivatives of іmіdazol-2-ylidene and analogues of the type 31A,B have been carried out in studies by Metallіnos, [147][148][149] and Grubbs et al…”

N‐heterocyclic carbenes. IV.1synthesis of symmetrical and unsymmetrical imidazolium salts with abietane moiety

“…Currently, a great deal of imidazolium salts exhibiting diverse structural motifs with high steric demands has been synthesized. Among them are derivatives of substituted naphthalene [9], terphenyl [10], phenanthrene and anthracene [11], phenanthroline [12], diamantane (dimer of adamantane) [13], and highly hindered aromatics [14]. Imidazolium salts containing monoterpenes have been described [15], but derivatives of di-and triterpenes are still unknown.…”