e.g. Filippa Pettersson or Cancer Res. 75(6) , 1102-12, (2015) or 10.1002/anie.201600521
Tetrahedron letters
The zwitterion-accelerated [3, 3]-sigmatropic rearrangement of allyl vinyl sulfoxided to sulfines. A specific class of charge-accelerated rearrangement
JR Hwu, DA Anderson
Index: Hwu, Jih Ru; Anderson, Denise A. Tetrahedron Letters, 1986 , vol. 27, # 41 p. 4965 - 4968
Abstract Conversion of allyl vinyl gulf oxides 5 and 8 to γ, δ-unsaturated sul fines 6 and 9, respectively, under neutral conditions shows that the accelerating effects of the charges in a zwitterionic moiety do not cancel, instead the sulfoxide functionality significantly facilitates