Information om | Engelska ordet ALLYLIC

Exempel på hur man kan använda ALLYLIC i en mening

• The Sharpless epoxidation reaction is an enantioselective chemical reaction to prepare 2,3-epoxyalcohols from primary and secondary allylic alcohols.
• Other reactions that tend to occur with allylic compounds are allylic oxidations, ene reactions, and the Tsuji–Trost reaction.
• Oxidative addition proceeds with retention of stereochemistry with vinyl halides, while giving inversion of stereochemistry with allylic and benzylic halides.
• In organic chemistry, the ene reaction (also known as the Alder-ene reaction by its discoverer Kurt Alder in 1943) is a chemical reaction between an alkene with an allylic hydrogen (the ene) and a compound containing a multiple bond (the enophile), in order to form a new σ-bond with migration of the ene double bond and 1,5 hydrogen shift.
• Allylpalladium intermediates also feature in the Trost asymmetric allylic alkylation and the Carroll rearrangement and an oxo variation in the Saegusa oxidation.
• The Ferrier rearrangement is an organic reaction that involves a nucleophilic substitution reaction combined with an allylic shift in a glycal (a 2,3-unsaturated glycoside).
• The Bellus–Claisen rearrangement is the reaction of allylic ethers, amines, and thioethers with ketenes to give γ,δ-unsaturated esters, amides, and thioesters.
• The Trost ligand is a diphosphine used in the palladium-catalyzed Trost asymmetric allylic alkylation.
• is a chemical reaction that involves the allylic or benzylic bromination of hydrocarbons using an N-bromosuccinimide and a radical initiator.
• The Overman rearrangement is a chemical reaction that can be described as a Claisen rearrangement of allylic alcohols to give allylic trichloroacetamides through an imidate intermediate.
• Allyl alcohols in general are prepared by allylic oxidation of allyl compounds, using selenium dioxide or organic peroxides.
• In the synthesis of , a bioactive natural product, the α,β-epoxyketone is formed from a cyclic α,β-unsaturated ketone and in a separate step reacts under the classical Wharton olefin synthesis conditions to yield an allylic diol.
• Under Corey–Kim conditions allylic and benzylic alcohols have a tendency to evolve to the corresponding allyl and benzyl chlorides unless the alcohol activation is very quickly followed by addition of triethylamine.
• Scandium nitrate has been found to be a successful catalyst in chemical reactions such as Beckmann rearrangement of ketoximes to amides and the isomerization of allylic alcohols to aldehydes.
• Examples of reactions using this reagent are the Negishi coupling, Suzuki coupling, Carroll rearrangement, and Trost asymmetric allylic alkylation, as well as Buchwald–Hartwig amination.
• In 2000 Fels proposed an intramolecular Heck reaction for the construction of the galanthamine backbone and in the same year Trost & Toste obtained (−)-galanthamine in an asymmetric synthesis involving asymmetric allylic alkylation and an intramolecular Heck reaction.
• Inclusion of the allylic functions presented an enhanced potential area of biotransformation, and thus alcuronium is observed to have a much shorter duration of neuromuscular blocking action than its parent C-toxiferine I.
• It can also be prepared by the halogen-exchange reaction between allyl chloride and hydrobromic acid or by the allylic bromination of propene.
• In certain cases, hydrosilylation results in vinyl or allylic silanes resulting from beta-hydride elimination.
• This term gives information about the relative stabilities of the involved conformers and the effect allylic strain has one equilibrium.

Förberedelsen av sidan tog: 137,55 ms.