Untitled

C‐Bridged Bispyrrolidines and Bispiperidines as New Ligands

“…For the first step we applied a protocol of Solomonov and co‐workers . The substituted pyridine derivative 11 is lithiated by n ‐butyllithium in ether at 0 °C and treated with either pyridine or α‐picoline.…”

“…We therefore developed two synthetic strategies for preparing methylene‐bridged 2,2′‐bistetrahydroquinolines. One of our first attempts to synthesize the methylene‐bridged 2,2′‐bisquinoline was the adaptation of the Ziegler‐type reaction protocol by Solomonov and co‐worker . For this purpose, 2‐methylquinoline 18 was lithiated by n ‐butyllithium and subsequently quinolone was added.…”

Role of the Bridging Group in Bis‐Pyridyl Ligands: Enhancing Both the Photo‐ and Electroluminescent Features of Cationic (IPr)CuI Complexes

“…The 2,2′‐dipyridylmethane (dpym) ligand was prepared by SN Ar reaction between α‐picolin and 2‐fluoropyridine in 78 % yield (Scheme ) . Dialkylation of dpym with iodomethane gave 2,2‐(2,2′‐dipyridyl)propane (dpyp) in 50 % yield (Scheme ) . Finally, 2‐bromopyridine was subjected to a halogen/lithium exchange reaction and then engaged with dichlorophenylphosphine to furnish phenyl‐2,2′‐dipyridylphosphine (PPhpy 2 ) in 72 % isolated yield (Scheme ) …”

“…[16] Dialkylation of dpym with iodomethane gave 2,2-(2,2'-dipyridyl)propane (dpyp) in 50 %y ield (Scheme 1). [17] Finally, 2-bromopyridine was subjected to ah alogen/lithium exchange reaction and then engagedw ith dichlorophenylphosphine to furnishp henyl-2,2'-dipyridylphosphine (PPhpy 2 ) in 72 %i solated yield (Scheme1). [18] Complex 2 was prepared according to our previously reported procedure by using [CuCl(IPr)] in 96 %i solated yield (Scheme 2).…”

Antiproliferative Copper(II) and Platinum(II) Complexes with Bidentate N,N‐Donor Ligands

“…Three different dipyridylmethane ligands L 1 – L 3 were synthesised according to previously published procedures, with slight changes for L 2 and L 3 resulting in enhanced yields of between 85 % and 93 % . L 1 was synthesised as described previously by Dyker et al For L 2 , 2‐ethylpyridine was lithiated in the α‐position, using n ‐butyllithium, and was then treated with 2‐fluoropyridine at low temperature (see the Exp.…”