Mn(III)-based oxidative free radical cyclization of unsaturated ketones.
作者:Barry B. Snider、Bridget McCarthy Cole
DOI:10.1021/jo00122a006
日期:1995.9
BOTTA, M.;CASTELLI, S.;GAMBACORTA, A., TETRAHEDRON, 1985, 41, N 14, 2913-2918
作者:BOTTA, M.、CASTELLI, S.、GAMBACORTA, A.
DOI:——
日期:——
Mn(III)-Based Oxidative Free-Radical Cyclizations of Unsaturated Ketones
作者:Bridget McCarthy Cole、Luning Han、Barry B. Snider
DOI:10.1021/jo961199u
日期:1996.1.1
free-radical cyclization of unsaturated ketones is a versatile synthetic procedure with broad applicability. For example, oxidation of cyclopentanone 1a with 2 equiv of Mn(OAc)(3).2H(2)O and 1 equiv of Cu(OAc)(2).H(2)O in AcOH at 80 degrees C for 1.5 h affords 75% of bicyclo[3.2.1]oct-3-en-8-one 8a and 15% of bicyclo[3.2.1]oct-2-en-8-one 9a. Bridgedbicyclicketones that cannot enolize further are isolated
Acid catalyzed rearrangements in bicyclo[3.3.1]nonanes
作者:M. Botta、S. Castelli、A. Gambacorta
DOI:10.1016/s0040-4020(01)96615-3
日期:1985.1
Treatment of endo-2 or exo-2-hydroxy-1-substituted ketals 1a–d with p-toluensulfonic acid in dry benzene results in a reversible C9 bridge cleavage and affords equilibrium mixtures where 2-substituted-6-(1,3-dioxolan-2-yl)cyclooctanones 6a–d are present as main products. Yields in 6a–d are present as the steric hindrance of the substituents at C1 in the substrate increases as well. Deuterium exchange