Intramolecular Diels–Alder reaction of 1,7,9-decatrienoates catalyzed by indium(III) trifluoromethanesulfonate in aqueous media
作者:Hikaru Yanai、Akio Saito、Takeo Taguchi
DOI:10.1016/j.tet.2005.05.062
日期:2005.7
The intramolecular Diels–Alder reaction of ester-tethered 1,7,9-decatrienoate derivatives in a mixture of water and 2-propanol was catalyzed by indium(III) triflate to give the cycloadducts in good yield with perfect endo-selectivity.
Intramolecular Diels–Alder (IMDA) reaction of α-fluoroacrylate derivatives 1a–e having 1,7,9-decatrienoate system is efficiently promoted by the novelbidentateLewisacid A generated in situ by mixing 3,3′,5,5′-tetrabromo-1,1′-biphenyl-2,2′-diol (Br4BIPOL, 1 mol) and trimethylaluminum (2 mol). The IMDA reaction of α-fluoroacrylates proceeds via endo-boat transition state as in the case of the corresponding
Efficient intramolecular Diels–Alder reactions of ester-tethered 1,7,9-decatrienoates catalyzed by bis-aluminated trifluoromethanesulfonamide
作者:Akio Saito、Hikaru Yanai、Takeo Taguchi
DOI:10.1016/j.tet.2004.10.012
日期:2004.12
Bis-aluminated trifluoromethanesulfonamide generated in situ by mixing TfNH2 (1 mol) and methylaluminum reagent (2 mol) is an effective catalyst for the IMDA reaction of ester-tethered 1,7,9-decatrienoates. (C) 2004 Elsevier Ltd. All rights reserved.
Enantioselective Oxazaborolidinium-Catalyzed Diels-Alder Reactions without CH⋅⋅⋅⋅O Hydrogen Bonding
作者:Michael N. Paddon-Row、Laurence C. H. Kwan、Anthony C. Willis、Michael S. Sherburn
DOI:10.1002/anie.200802002
日期:2008.9.1
Aspects of the intramolecular Diels-Alder reactions of some 1,3,9-trienic amides, amines, and esters. An approach to the pentacyclic skeleton of the yohimboid alkaloids
作者:Stephen F. Martin、Sidney A. Williamson、R. P. Gist、Karl M. Smith