Wienken, Stefan; Neumann, Wilhelm P., Chemische Berichte, 1993, vol. 126, # 3, p. 769 - 774
作者:Wienken, Stefan、Neumann, Wilhelm P.
DOI:——
日期:——
US8835345B2
申请人:——
公开号:US8835345B2
公开(公告)日:2014-09-16
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