enol ether造句

• Enol ethers and glycals are nucleophilic enough to be fluorinated by Selectfluor.
• They are also an important intermediate in the formation of silyl enol ether.
• It is also used for preparation of enol ethers and related functional groups.
• It is the 3-cyclopentyl enol ether of 17?-hydroxyprogesterone acetate.
• The Tebbe reagent converts esters and lactones to enol ethers and amides to enamines.
• The archetypical reaction is that of the silyl enol ether of cyclohexanone with benzaldehyde.
• The trimethylsilyl enol ethers can also be used as masked enolate equivalents in the Mukaiyama aldol addition.
• Cyclic silyl enol ethers have been demonstrated to be viable substrates for regiocontrolled one-carbon ring contractions.
• In the presence of triethylamine and lithium diisopropylamide, enolisable aldehydes, ketones and esters are converted to trimethylsilyl enol ethers.
• As a consequence, the double bond geometry in the silyl enol ether or allylsilane does not translate well into product stereochemistry.
• Another organic synthetic method using silver ( I ) fluoride is the BINAP-AgF complex catalyzed enantioselective protonation of silyl enol ethers:
• An example is the Mukaiyama aldol addition reaction between benzaldehyde and the silyl enol ether of cyclohexanone with an 81 % chemical yield.
• The Mukaiyama aldol reaction and the Sakurai reaction refer to the addition of silyl enol ethers and allylsilanes to carbonyl compounds, respectively.
• Diverse tethered nonaromatic ?-nucleophiles, such as silyl enol ethers, allylsilanes and enamines, could be chemoselectively added to activated amides.
• In the "'Saegusa Ito oxidation "'certain silyl enol ethers are oxidized to enones with palladium ( II ) acetate.
• Critically, the terminus of the double bond in enols, enolates, and silyl enol ethers that lacks the hydroxyl group is aldol and related reactions ).
• Ketone "'25 "'( Scheme 3 ) was protected as the TMS enol ether and subsequently was oxidized with M-chloroperoxybenzoic acid.
• The major improvement provided by Saegusa and Ito was the recognition that the enol form was the reactive species, developing a method based on silyl enol ethers.
• An example of the scientific use of scandium triflate is the Mukaiyama aldol addition reaction between benzaldehyde and the silyl enol ether of cyclohexanone with an 81 % yield.
• Like the aldol addition, the Michael reaction may proceed via an enol, silyl enol ether in the Mukaiyama-Michael addition, or more usually, enolate nucleophile.