Dehalogenation - Wikipedia
In organic chemistry, dehalogenation is a set of chemical reactions that involve the cleavage of carbon - halogen bonds; as such, it is the inverse reaction of halogenation. Dehalogenations come in many varieties, including defluorination (removal of fluorine), dechlorination (removal of chlorine), debromination (removal of bromine), and ...
Enzymatic Halogenation and Dehalogenation Reactions: …
2017年1月20日 · Accounting for the different chemical properties of the four halogen atoms (fluorine, chlorine, bromine, and iodine) and the diversity and chemical reactivity of their organic substrates, enzymes performing biosynthetic and degradative halogenation chemistry utilize numerous mechanistic strategies involving oxidation, reduction, and substitution.
Microbial Transformation of Iodine: From Radioisotopes to Iodine …
2017年1月1日 · Under anaerobic conditions, dehalogenation and reductive reactions (predominately catalyzed by microorganisms) can elicit release of iodine from organic matter (small white arrows). Iodinated organic matter exists primarily as stationary, particle-associated species, but to a lesser extent as mobile colloids.
Synthesis of Radioiodinated Compounds. Classical Approaches …
1. Deiodinases specifically catalyze the reductive dehalogenation of an iodinated aromatic ring, most often an ortho-iodophenol one. 2. Cytochrome P450 (CYP450) enzymes, expressed mainly in the liver and lungs, are the main class of enzymes responsible for the oxidation of xenobiotics in vertebrates to increase their hydrophilicity.
Electrochemical reductive dehalogenation of iodine-containing …
2018年6月1日 · Iodine species released from iopamidol and diatrizoate react readily with NOM. •. EC reduction can deiodinate ICMs effectively in optimized mass transfer condition. Abstract. This study examined the electrochemical (EC) reduction of iodinated contrast media (ICM) exemplified by iopamidol and diatrizoate.
Electrochemical reductive dehalogenation of iodine-containing …
2018年6月1日 · Iodine species released from iopamidol and diatrizoate react readily with NOM. •. EC reduction can deiodinate ICMs effectively in optimized mass transfer condition. Abstract. This study examined the electrochemical (EC) reduction of iodinated contrast media (ICM) exemplified by iopamidol and diatrizoate.
This paper summarizes results of research on the electrochemical (EC) degradation of disinfection by-products (DBPs) and iodine-containing contrast media (ICMs), with the focus on EC reductive dehalogenation. The efficiency of EC dehalogenation of DBPs increases with the number of halogen atoms in an individual DBP species.
Iodide-ion Catalysis of the Elimination of Iodine from trans ...
Iodocyclization versus diiodination in the reaction of 3-alkynyl-4-methoxycoumarins with iodine: Synthesis of 3-iodofuro[2,3-b]chromones. Organic & Biomolecular Chemistry 2011, 9 (5) , 1474.
Stereospecific syn-dihalogenations and regiodivergent syn
2024年5月2日 · Shortly after, in 2016, diastereoselective 1,2-difluorination of alkenes including syn-stereospecific examples was developed by the Jacobsen group with hypervalent iodine(III) difluoride 28.
The Iodide Ion-promoted Dehalogenation of cis- and trans1,2 ...
A wide range of nucleophiles have induced the elimination of iodine from (E)-diiodoalkenes to form alkynes under surprisingly mild conditions. The iodide anion is particularly efficient, and can … Expand