Hemiacetals form when a neutral alcohol reacts with acarbonyl group, resulting in a structure with both an alcohol (–OH) and an ether (–OR) in geminal positions. Stability occurs in cyclic forms, whileacyclichemiacetals revert to carbonyls or convert to acetals upon furtherreacti...
Yes, the way I learned it (and I certainly qualify as old-time!), aldehydes make acetals and ketones make ketals. The way IUPAC seems to like it now, a ketal is just an acetal in which the C-H bond is replaced with a C-C bond. (Wikipedia image) Yes, the way I learned it (...
Funabiki et al., Enamine-assisted facile generation of trifluoroacetaldehyde from trifluoroacetaldehyde ethyl hemiacetal and its carbon-carbon bond forming reaction leading to beta-hydroxy-beta-trifluoromethyl ketones, Chem. Commun. (England), 1998, pp. 2051-2052....
The 25.16 Mhz Carbon-13 Magnetic Resonance Spectra Of A Tricyclic Acetal And A Tricyclic HemiacetalAcetal MethanolysisCmr SpectrumOzonolysis of the N-phenylmaleimide-cyclopentadiene Diels-Alder adduct in methanol followed by reductive work-up with dimethyl sulfide affords 3-phenyl-endo,endo,cis,-6,8-...