4-Isopropyl-2-oxazolin-5-one anion as a new convenient formyl anion equivalent for conjugate addition and aldol reactions.
作者:Achille Barco、Simonetta Benetti、Carmela De Risi、Gian P. Pollini、Giampiero Spalluto、Vinicio Zanirato
DOI:10.1016/s0040-4039(00)79260-4
日期:1993.6
The anion of the title compound, simply generated in the presence of catalytic amount of triethylamine, acts as nucleophilic acylating equivalent of formaldehyde reacting with both common electrophilic olefins or aldehydes to give moderate to good yield of Michael or aldol adducts respectively, which are easily hydrolized by dilute acid at ambient to temperature to afford the corresponding aldehydes
4-Isopropyl-2-oxazolin-5-one anion as masked umpoled synthon for both formyl and hydroxycarbonyl anions: Generation, reactivity and synthetic applications
作者:Achille Barco、Simonetta Benetti、Carmela De Risi、Gian P Pollini、Giampiero Spalluto、Vinicio Zanirato
DOI:10.1016/0040-4020(96)00143-3
日期:1996.3
formaldehyde. On the other hand, the same anion of 1 may act as a masked umpoled synthon for a hydroxycarbonyl anion since its aldol adducts with aldehydes underwent concomitant isomerization and ring cleavage under mild basic conditions producing dipeptides which could be hydrolyzed to give the corresponding carboxylic acids. Synthetic applications of this chemistry in the area of sugar, aminosugar and non-proteinogenic