Information om | Engelska ordet GRIGNARD

Exempel på hur man kan använda GRIGNARD i en mening

• In discussing mechanisms of organic reactions, methyl lithium and related Grignard reagents are often considered to be salts of ; and though the model may be useful for description and analysis, it is only a useful fiction.
• In the history of the Nobel Prize in Chemistry awards have been given for the invention of specific organic reactions such as the Grignard reaction in 1912, the Diels–Alder reaction in 1950, the Wittig reaction in 1979 and olefin metathesis in 2005.
• Examples of reactions requiring the use of anhydrous solvents are the Grignard reaction and the Wurtz reaction.
• The reaction of an organic halide with magnesium is not a Grignard reaction, but provides a Grignard reagent.
• While staying in Paris, Gilman met Victor Grignard and was intrigued by the advances in organic chemistry in France made possible by Grignard reagents.
• These reagents are useful because, unlike related Grignard reagents and organolithium reagents, they react with organic halides to replace the halide group with an R group (the Corey–House reaction).
• Francois Auguste Victor Grignard (6 May 1871 – 13 December 1935) was a French chemist who won the Nobel Prize for his discovery of the eponymously named Grignard reagent and Grignard reaction, both of which are important in the formation of carbon–carbon bonds.
• Early investigators observed that copper(I) halides catalyse 1,4-addition of Grignard reagents to alpha,beta-unsaturated ketones led to the development of organocuprate reagents that are widely used today in organic synthesis:Jasrzebski, J.
• In the laboratory it can be prepared via Grignard reaction by reacting ethylmagnesium bromide with acetaldehyde in dried diethyl ether or tetrahydrofuran.
• It can also be produced by the catalytic hydration of isobutylene, or by a Grignard reaction between acetone and methylmagnesium chloride.
• Reaction of a Grignard reagent with triethyl orthoformate gives an acetal, which can be hydrolyzed to an aldehyde.
• In principle, a carbanion equivalent such as an organolithium or Grignard reagent can react directly (without copper) with an alkyl halide in a nucleophilic substitution reaction to form a new carbon–carbon bond.
• Diphenylmethanol may be prepared by a Grignard reaction between phenylmagnesium bromide and benzaldehyde.
• Vinyl bromide and related alkenyl halides form the Grignard reagent and related organolithium reagents.
• Selenols are usually prepared by the reaction of organolithium reagents or Grignard reagents with elemental Se.
• The Bartoli indole synthesis (also called the Bartoli reaction) is the chemical reaction of ortho-substituted nitroarenes and nitrosoarenes with vinyl Grignard reagents to form substituted indoles.
• In his works Kipping was noted for using Grignard reagents to make alkyl
• Perilla ketone was synthesized in 1957 by Matsuura from 3-furoyl chloride and an organocadmium compound similar to the Gilman reagent made from an isoamyl Grignard reagent and cadmium chloride.
• It is known that magnesium center in Grignard reagents typically coordinates two molecules of ether such as diethyl ether or tetrahydrofuran (THF).
• In cases where the Grignard reagent is adding to an aldehyde or a prochiral ketone, the Felkin-Anh model or Cram's Rule can usually predict which stereoisomer will be formed.

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