Russian Chemical Bulletin p. 1104 - 1106 (1997)
Update date:2022-08-28
Topics:
Permin
Petrosyan
Rhodium(I) dimeric complexes, [(Ph3P)4Rh2Cl2] and [(C2H4)4Rh2Cl2], form active catalysts for alkenes isomerization on interaction with tertiary phosphine and tin dichloride in CH2Cl2. Besides 2-methylbut-2-ene, which is the normal product of 1,2-double bond migration, 3-methylbut-1-ene gives the product of unusual 1,3-double bond migration, 2-methylbut-1-ene, which is formed at early stages of the reaction under kinetic control in over-equilibrium quantities. The proposed mechanism for 1,3-double bond migration includes the methyl C-H bond activation, followed by intramolecular transfer hydrogenation.
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