organic chemistry, reviewaldehyde derivatives (benzene compoundsaldehyde derivatives (acyclic compoundsketone derivatives (benzene compoundsketone derivatives (acyclic compoundsReview: 405 refs.doi:10.1002/chin.201333245MurrayB. A.John Wiley & Sons, Ltd.Cheminform...
The reaction of an aldehyde or ketone with a phosphonium ylide to an alkene and a phosphine oxide is known as Wittig reaction or Wittig Olefination reaction. This reaction was discovered in 1954 by Georg Wittig, for which he was awarded the Nobel Prize in Chemistry in 1979. * The yields ...
Treatment of oxime ethers with Bu3SnH and AIBN gave N-norpyrroloquinoline as a major product, which was also obtained by the radical reaction of the corresponding hydrazone and imine. The radical reaction of aldehyde and ketone carrying unsaturated ester proceeded stereoselectively ...
(这通常发生在酸性条件下)One example of this type of proton transfer we’ve covered before is in the formation of an acetal from an aldehyde or ketone (See post: Hydrates, Hemiacetals, and Acetals) like this:我们之前介绍过的这种质子转移的一个例子是从醛或酮形成缩醛(参见博文:水合物、半缩醛...
The resulting ylide is then ready to go. No need to isolate it – just add an aldehyde or ketone, and the reaction should proceed nicely. 4. Some Examples Of The Wittig Reaction For example, here’s the above ylide in a Wittig reaction with cyclohexanone: ...
The Wittig reaction is the chemical reaction of an aldehyde or ketone with a triphenyl phosphonium ylide (the Wittig reagent) to afford an alkene and triphenylphosphine oxide. Noteworthy, this reaction results in the synthesis of alkenes in a selective and predictable fashion. Thus, it became as ...
The Wittig reaction is the chemical reaction of an aldehyde or ketone with a triphenyl phosphonium ylide (the Wittig reagent) to afford an alkene and triphenylphosphine oxide. From: The Alkaloids: Chemistry and Biology, 2020 About this pageAdd to MendeleySet alert Also in subject areas: Biochemist...
When the Tosyl hydrazone of an aldehyde or ketone is treated with Na in ethylene glycol, a Bamford–Stevens reaction occurs, which results in the synthesis of alkene. NaOMe, NaH, LiH, NaNH2, and other strong bases are also used. Side reactions are widespread, and the orientation of the ...
with methyl iodide and magnesium in ether medium without separation with aldehyde or ketone occurs further reaction, the reaction product can be obtained after hydrolysis of the corresponding alcohols. The reaction process can be expressed as:Later studies show that alkyl magnesium halides (Grignard ...
selenoaldehydeselenoketoneDiels-Alder reactionSelenoaldehydes and selenoketones, generated by thermal retro-Diels-Alder reaction of their cycloadducts with cyclopentadiene, reacted with oxygen-functionalized conjugated dienes such as 1-acetoxy-1,3-butadiene, Danishefsky's diene, and 1,4-diacetoxy-1,3-...