Now showing items 1-7 of 7
Asymmetric oxidation of 2-(arylsulfenyl)pyrroles
The asymmetric oxidation of prochiral 2-(arylsulfenyl)pyrroles has been investigated. A marked electronic effect within the substrate significantly influenced the degree of enantioselectivity obtained, with very high enantio ...
Isolation and characterization of a novel tetrahydro-[2,2 ']bipyrrolyl dimer as an impurity from a Knorr reaction
A novel dimer, tetraethyl 2,2',3,3'-tetramethyl-1,1',2,2'-tetrahydro-4H,4'H-2,2'-bipyrrolyi-5,5,5',5'-tetracarboxylate, has been isolated as an impurity (0.4% yield) from a Knorr reaction for the synthesis of ...
Heteroleptic zinc dipyrromethene complexes
H-1 NMR spectroscopy has been used to study the complexation of a per-alkyl dipyrromethene with zinc acetate. An intermediate, assigned to be the heteroleptic Zn(dipyrromethene) (acetate) complex, is observed under titration ...
Synthesis of dipyrrins bearing chirality adjacent to the conjugated skeleton - Electron-poor pyrroles exhibit dramatically reduced nucleophilicity
With the aim of furthering our investigations into the asymmetric complexation of dipyrrinato ligands, a dipyrrin bearing a stereogenic centre directly adjacent to the conjugated skeleton was synthesized. The electron- ...
Microwave-accelerated synthesis of benzyl 3,5-dimethyl-pyrrole-2-carboxylate
Benzyl 3,5-dimethyl-pyrrole-2-carboxylate, a very useful pyrrole in porphyrin and dipyrromethene synthesis, can be synthesized via the Knorr-type reaction, but in low yield. Alternative routes to benzyl 3,5-dimethyl-pyrr ...
Chloride anion transport and copper-mediated DNA cleavage by C-ring functionalized prodigiosenes
A new class of prodigiosenes with stability-enhancing functionalities appended to the C-ring were found to transport chloride anions through liposomal membranes, as well as to induce copper-mediated DNA cleavage.