Action des composes organomagnesiens sur les pyrones-2-VII
作者:P. Lhoste、M. Moreau、J. Dreux
DOI:10.1016/s0040-4020(01)91804-6
日期:1984.1
In the reaction between organomagnesiumcompounds and 2-pyrones, the relative stability of the 6-hydroxy 5,6-dihydro 2H-pyrans and their tautomeric forms (ketols) has no influence on the reaction pathway. When ethylenic ketols are obtained, the corresponding tautomeric dihydropyranols are prepared in a selective way by reaction of nucleophilic reagents on the 3,6-dihydro-2-pyrones. In the other hand