Moreover, they generally suffer from using expensive reagents, strongly acidic/basic reaction conditions, long reaction times and limitation to use both aromatic and aliphatic epoxides
as starting materials.
hydrolysis was initiated by adding the preheated sEH solution (37[degrees]C for 5 min) to the substrate system, and the reactions was conducted for 5 min.
Glutathione Stransferase A1-1-catalysed conjugation of bay and fjord region diol epoxides
or polycyclic aromatic hydrocarbons with glutathione.
The formulation, molecular weight, and polydispersity index of epoxides
used in this study are given in Table 9.
are highly reactive organic compounds comprised of a triple ring with two carbon atoms and one oxygen atom.
Because PAH diol epoxides
are mutagenic and carcinogenic, the results clearly demonstrate the immediate negative health consequences of smoking, which should serve as a major warning to anyone contemplating initiating tobacco use," the scientists said.
Methyl (E,Z,Z)-, (ZE,Z)- and (E,E,Z)-2,4,6-decatrienoates were synthesized as previously described (Khrimian 2005), as were (4S)-cis- and (4S)trans-(Z)-[alpha]-bisabolene epoxides
(Z)-(1R,2S,4S)-4(1',5'-dimethyl 1',4'-hexadienyl)-1,2-epoxy-1-methylcyclohexane and (Z)-(1S,2R,4S)-4-(1',5'-dimethyl 1',4'-hexadienyl)-1,2-epoxy-1-methylcyclohexane), respectively, (Chen et al.
In solution, the reaction of amines with epoxides
probably occurs by both catalyzed and non-catalyzed pathways, though the catalyzed pathway is significantly lower in energy and therefore dominant when hydrogen-bonding species are present.
The resulting epoxides
readily dissolve into droplets of moisture in the air to form organic-rich aerosols, Paulot says.
In a previously published article, we have reported that a carbazole-bound ferrocenium salt was highly efficient as a photoinitiator in the photopolymerization of epoxides
(15), However, it was found to have poor solubility in most cationically polymerizable monomers, especially in those of commercial interest.
The hardener is prepared by a process comprised of reacting a mixture comprised of at least one epoxidized polyalkylene oxide selected from the group of epoxidized polyethylene oxides, epoxidized polypropylene oxides, epoxidized polyethylene propylene oxides and mixtures thereof; at least one epoxidized aromatic hydroxy compound selected from the group of bisphenol A epoxides
, bisphenol F epoxides
and mixtures thereof; and at least one aromatic hydroxy compound selected from the group of bisphenol A, bisphenol F and mixtures thereof, to form an intermediate product; and introducing an excess amount of polyamine sufficient for the reaction of one molecule of polyamine with each epoxy group in the intermediate product, and reacting the intermediate product with the polyamine.
They also cover nucleic substitution at aliphatic carbon, synthesis of epoxides
and aziridines, the protonation of enolates and kinetic resolution of racemic alcohols and amines.