User:Rperreau
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thumb|# To do: #Change electron arrows to red color? #Fill out all sections until sufficient coverage, including applications section #Remove storage section from bottom #ortho vs para claisen for disubstituted (or even monosubstituted ortho positions #Remove [5,5] Claisen? #fluxional tautomerism of bullvalene #Text description for Murray series #Mukai antara-antara [3,3] shift Tet Lett 1967, 3433 in HCH 126 #[1,4] rearrangement Swatton-Hart rearrangement delocalized positive charge and "migrating" OH in D.W. Swatton and H. Hart, J. Am. Chem. Soc. 89, 5-75 (1967); occurs with inversion #[3,4] in competition with [1,2] and [3,3] from H.J. Hansen, B. Sutter, and H. Schmid, Helv. Chim. Acta 51, 828 (1968) # Berson and Willcott with [1,5] sequential shifts in norcaradienes, separate section from J.A. Berson and M.R. Willcott III, J. Am. Chem. Soc., 87, 2751, 2752 1965 88, 2494 (1966) # Woodward Hoffmann Concise Rules Chart and more FO examples etc. #Photochemical [1,5] shifts? in WH 124
A Sigmatropic reaction in organic chemistry is a pericyclic reaction wherein the net result is one σ-bond is changed to another σ-bond in an uncatalyzed intramolecular process.[1] The name "sigmatropic" is the result of a compounding of the long-established sigma designation from single carbon-carbon bonds and the greek word tropos, meaning "a turn." In this type of rearrangement reaction, a substituent moves from one part of a π-bonded system to another part in an intramolecular reaction with simultaneous rearrangement of the π system.