82201-15-8Relevant academic research and scientific papers
Origin of the preference for the chair conformation in the cope rearrangement. Effect of phenyl substituents on the chair and boat transition states
Shea,Stoddard,England,Haffner
, p. 2635 - 2643 (1992)
d, l- and meso-2,2′-bis[1-methylene-1,2,3,4-tetrahydronaphthalenes] 8 and 9 were synthesized, and the activation energy parameters for their unimolecular [3,3] sigmatropic rearrangement to 1,2-bis(3,4-dihydro-1-naphthalenyl)ethane (13) were determined. Th
Silicon-Directed Nazarov Reactions II. Preparation and Cyclization of β-Silyl-substituted Divinyl Ketones
Jones, Todd K.,Denmark, Scott E.
, p. 2377 - 2396 (2007/10/02)
Two general methods for the preparation of β-silyl-substituted divinyl ketones have been developed starting from either α,β-unsaturated aldehydes or simple ketones.Anhydrous FeCl3 induces the cyclization to cyclopentenones under mild conditions and in good yields with predictable and complete control over the position of the double bond in the five-membered ring.The observed effects of substituents on rate can be explained by a rate-determining cationic electrocyclization.Silyl substitution has been shown to retard the reaction.
ENEPHOSPHINILATION
Mislankar, Dattatraya G.,Mugrage, Ben,Darling, S. D.
, p. 4619 - 4622 (2007/10/02)
A general method is described for the formation of vinylphosphines from arylsulfonylhydrazones.Oxidation of the resulting vinylphosphines yields phosphine oxides.
