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Samarium (II) iodide. Samarium (II) iodide is an inorganic compound with the formula SmI 2. When employed as a solution for organic synthesis, it is known as Kagan 's reagent. SmI 2 is a green solid and forms a dark blue solution in THF. [1] It is a strong one-electron reducing agent that is used in organic synthesis .
Samarium (II) iodide is a one-electron reductant, and typically effects reduction through a series of electron transfer and proton transfer (from protic solvent) steps. [4] [3] Reducible functional groups include: α-Functionalized carbonyl compounds. Ketones and aldehydes. Carboxylic acids (under strongly acidic or basic conditions) Organic ...
Barbier reaction. The Barbier reaction is an organometallic reaction between an alkyl halide (chloride, bromide, iodide), a carbonyl group and a metal. The reaction can be performed using magnesium, aluminium, zinc, indium, tin, samarium, barium or their salts. The reaction product is a primary, secondary or tertiary alcohol.
The Julia olefination (also known as the Julia–Lythgoe olefination) is the chemical reaction used in organic chemistry of phenyl sulfones (1) with aldehydes (or ketones) to give alkenes (olefins) (3) after alcohol functionalization and reductive elimination using sodium amalgam [1] [2] or SmI 2. [3] The reaction is named after the French ...
Desulfonylation reactions. Desulfonylation reactions are chemical reactions leading to the removal of a sulfonyl group from organic compounds. As the sulfonyl functional group is electron -withdrawing, [1] methods for cleaving the sulfur –carbon bonds of sulfones are typically reductive in nature. Olefination or replacement with hydrogen may ...
Incapillo is a Pleistocene -age caldera – a depression formed by the collapse of a volcano – in La Rioja Province, Argentina. It is part of the southernmost volcanic centre in the Andean Central Volcanic Zone (CVZ). Subduction of the Nazca Plate beneath the South American Plate is responsible for most of the volcanism in the CVZ.
Evans–Tishchenko reaction. The Evans–Tishchenko reaction is the diastereoselective reduction of β-hydroxy ketones to the corresponding 1,3- anti diol mono esters. The reaction employs a Lewis acid, often samarium iodide, and an aldehyde. It was first described in 1990 by David A. Evans and Amir Hoveyda, as a development of the well-known ...
Annulation. In organic chemistry, annulation (from Latin anellus 'little ring'; occasionally annelation) is a chemical reaction in which a new ring is constructed on a molecule. [1] Examples are the Robinson annulation, Danheiser annulation and certain cycloadditions. Annular molecules are constructed from side-on condensed cyclic segments, for ...