23239-88-5Relevant articles and documents
Cyclometalated Ruthenium(II) NHC Complexes with Imidazo[1,5-a]pyridine-Based (C^C*) Ligands – Synthesis and Characterization
Schleicher, David,Tronnier, Alexander,Soellner, Johannes,Strassner, Thomas
, p. 1956 - 1965 (2019/03/07)
We present the synthesis and characterization of cyclometalated ruthenium(II) NHC complexes with phenyl-substituted imidazo[1,5-a]pyridine C^C* ligands. The corresponding p-cymene complexes can be reacted with bipyridine to form bisheteroleptic ruthenium(II) dyes. The compounds have been characterized by one- and two-dimensional 1H/13C NMR spectroscopy, elemental analysis, cyclic voltammetry, infrared spectroscopy, as well as solid-state structure (X-ray) analysis.
Organosilicon synthesis of isocyanates: III. Synthesis of aliphatic, carbocyclic, aromatic, and alkylaromatic isocyanatocatboxylic acid esters
Lebedev,Lebedeva,Sheludyakov,Ovcharuk,Kovaleva,Ustinova
, p. 1069 - 1080 (2008/02/05)
A series of aminoacid esters was prepared by treating the aminoacid suspensions in ethanol with thionyl chloride. Best conversion of aminoacid esters to corresponding isocyanates was achieved in the case of aromatic and carbocyclic aminoesters by phosgeneation of their N-silyl derivatives, and in the case of aliphatic and alkylaromatic aminoesters by phosgeneation of O-silyl or N,O-bissilylurethanes on their basis. In the last case additional step of esterification of the by-products isocyanatoalkylcarboxylic acid chlorides is required after phosgeneation. Unusual generation of cynnamates and intramolecular N→O-migration of trimethylsilyl group in the solutions of silylated alkylaromatic β-aminoacid esters were found. Pleiades Publishing, Inc., 2006.
Synthesis and Serotonergic Activity of 5-(Oxadiazolyl)tryptamines: Potent Agonists for 5-HT1D Receptors
Street, Leslie J.,Baker, Raymond,Castro, Jose L.,Chambers, Mark S.,Guiblin, Alexander R.,et al.
, p. 1529 - 1538 (2007/10/02)
The synthesis and 5-HT1D receptor activity of a novel series of 5-(oxadiazolyl)tryptamines is described.Modifications of the oxadiazole 3-substituent, length of the linking chain (n), and the amine substituents are explored and reveal a large binding pocket in the 5-HT1D receptor domain.Oxadiazole substituents such as benzyl are accommodated without loss of agonist potency or efficacy.The incorporation of polar functionality on a phenyl or benzyl spacer group results in a 10-fold increase in affinity and functional potency.Optimal 5-HT1D activity is observed when the heterocycle is conjugated with the indole and the benzyl sulfonamides 20t and 20u represent some of the most potent 5-HT1D agonist known.Replacement of O for S in the heterocycle leads to a further increase in potency.Deletion of oxadiazole N-2 does not reduce activity, suggesting the requirements for only one H-bond acceptor in this location.The selectivity of these compounds for 5-HT1D receptors over other serotonergic receptors is discussed.Sulfonamide 20t shows 1000-fold selectivity for 5-HT1D over 5-HT2, 5-HT1C, and 5-HT3 receptors and 10-fold selectivity with respect to 5-HT1A receptors.The functional activity of this series of compounds is studied and demonstrates high 5-HT1D receptor potency and efficacy comparable to that of 5-HT.
