The migration and retention of substituent X was first encountered during studies of the para-hydroxylation of phenylalanine by enzymes present in mammalian liver and bacterial systems. Since the latter observations were made at the National Institutes of Health (Bethesda, Md, USA), the process has...
Divergence of carbonyl ylide reactions as a function of diazocarbonyl compound and aldehyde substituent: dioxolanes, dioxolenes, and epoxides.dioxole derivativesring closure reactionsoxirane derivativesThe products from dirhodium(II) acetate-catalyzed reactions between diazocarbonyl compounds and a series of...
The key difference between the target material and the read-across analog is that the target material has a methyl substituent on the benzaldehyde fragment, whereas the read-across analog benzaldehyde, 4-ethyl- (CAS # 4748-78-1) has an ethyl group. This structural difference between the target...
Control experiments revealed that reaction of aldonitrones having electron-withdrawing groups on the C-aryl substituent in polar aprotic solvents exhibited high product selectivity while reaction temperature has only a negligible effect on product yield and selectivity. An aerobic oxidation of alcohols ...
a linear or branched alkyl group that has from 1 to 10, carbon atoms containing as a substituent amido, amino, monoalkylamino, dialkylamino, monoalkylamido, dialkylamido alkoxy, alkylthio, hydroxy, thiol, carboxylic acid or carboxylic acid alkyl ester group(s), or a 1H-imidazole-, phenyl-...
This is why in your initial structure, the name is 4-oxo: it is the double-bonded oxygen which is a substituent on carbon number 4 following IUPAC numbering.The difference between when you use oxo and when you use formyl - you use oxo when the =O is on the carbon chain you are ...
Divergence of Carbonyl Ylide Reactions as a Function of Diazocarbonyl Compound and Aldehyde Substituent: Dioxolanes, Dioxolenes, and Epoxides.doi:10.1002/chin.200449109dioxole derivativesring closure reactionsoxirane derivativesFor Abstract see ChemInform Abstract in Full Text.Albert E. Russell...
as the present amide compound. The substituent on the optionally substituted phenoxy of the present amide compound, which is a starting compound of the present process, and the present pyridone compound includes, for example, a halogen atom (e.g. a fluorine atom, chlorine atom, bromine atom ...
of this method, it has not been applied in direct condensation of cholecalciferol C-22 phenylsulfonyl derivative, having methyl group at the alfa position in respect to the phenylsulfonyl substituent, and aliphatic aldehyde having at alfa position bulky substituent, such as tert-butyl-diphenylsilyl. ...