the regioselective ring opening of styrene oxide using elemental iodine and bromine in the presence of disulfides as new catalysts was studied. the conductivity titration and uv spectroscopy were used to study the interaction of iodine with these catalysts. the results indicate that disulfide 11 is efficient in polyiodide formation, and can catalyze this reaction in excellent yield and high reg...

The reaction between epoxides and CO2 to yield cyclic carbonates is efficiently promoted under solvent-free relatively mild conditions (0.5 mol % catalyst loading, 0.8 MPa, 125 °C) by zinc(II) complexes of pyridine containing macrocyclic ligands (Pc−L pyridinophanes). zinc have been fully characterized, including X-ray structural determination. [Zn(II)X(Pc−L)]X showed good solubility in several...

New highly nucleophilic homogeneous and heterogeneous catalysts based on the 3,4-diaminopyridine scaffold are reported for halogen-free cycloaddition of CO2 to epoxides.

Group 4 metallocene complexes are effective catalysts in the ring-opening copolymerisation of epoxides and anhydrides to afford bio-derived polymers.

A divergent protocol for nucleophilic opening of vinyl epoxides with ethoxyacetylide has been developed and demonstrated to give complete regioselectivity depending on reaction conditions.

Ionic liquids (ILs) offer new possibilities for epoxide hydrolase (EH) catalyzed resolution of epoxides and for synthesis of chiral 1,2-diols. Soluble EHs from cress and mouse (csEH and msEH) and microsomal EH from rat (rmEH) were tested in several ILs. For all the enzymes tested, higher enantioselectivities were obtained in [bmim][N(Tf)(2)] and [bmim][PF(6)]. The optimized amount of water for ...

The mutagenicity of 17 aliphatic epoxides was determined using the specially constructed mutants of Salmonella typhimurium developed by Ames. The activity of these epoxides together with those reported in the literature as mutagens in strains TA100 and TA1535 depended on the degree of substitution around the oxirane ring. Monosubstituted oxiranes were the most potent mutagens in both strains. 1...

The unexpected formation of cross-linked silicon materials was observed via hydrosilylation unsaturated epoxides with polymethylhydrosiloxane using Co2(CO)8 as a catalyst.