Generation and synthetic uses of stable 4-[2-isopropylidene]-phenol carbocation from bisphenol A.
[reaction: see text] Stable 4-[2-isopropylidene]-phenol carbocation, IPP cation 1, was generated readily by addition of bisphenol A in concentrated sulfuric acid at ambient temperature, and the cation could be used for facile syntheses of 4-isopropenyl phenol (IPP), IPP dimers, and spiro-bisphenol derivatives.
Chen
Wei-Fu
WF
Department of Chemical Engineering, National Chung Hsing University, Taichung 402, Taiwan, ROC.
Lin
Hsing-Yo
HY
Dai
Shenghong A
SA