Tetrahedron Letters p. 1417 - 1420 (1980)
Update date:2022-08-04
Topics:
Schiess, Peter
Stalder, Henri
3,3-Disubstituted 3H-pyrazoles la - e aromatise through an intramolecular sigmatropic 1,5-(1,2-)shift of one of the quaternary groups.From a kinetic study of the uncatalysed and of the acid catalysed isomerisation reaction migration tendencies of functional groups in sigmatropic rearrangement toward neutral and toward cationic centers are obtained.
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Doi:10.1016/S0040-4039(00)93177-0
(1980)Doi:10.1016/S0022-328X(00)86664-4
(1980)Doi:10.1007/BF02464191
(1998)Doi:10.1021/jo00314a031
(1981)Doi:10.1081/SIM-120030430
(2004)Doi:10.1016/S0022-328X(00)85395-4
(1969)
