Diels-AlderReaction

Breslow, R. Maitra, U. Rideout, D. Selective Diels-Alderreactions in aqueous solutions and suspensions, Tetrahedron Lett. 1983, 24, 1901-1904. 

Diels-Alderreactions. This salt acts as a bidentate Lewis acid to activate conjugated carbonyl compounds toward dienes. Note that lithium 4,6-di-t-butylphenoxide is practically ineffective under the same conditions. 

Reviews (a) J. Hamer (Ed.), 1,4-Cycloaddition Reactions. The Diels-AlderReaction inHet-erocyclic Syntheses, Academic Press, New York, 1967. 

Diels-Alderreactions. The dienophilic reactivity of A-allylacrylamides is enhanced by way of oxazolinium ion formation in the presence of iodine. 

Schuster, T., Bauch, M., Diirner, G. and Gohel, M.W. (2000) Axially chiral amidinium ions as inducers of enantioselectivity in Diels-Alderreactions. Organic Letters, 2,179-181 Schuster, T., Kurz, M. and Gohel, M.W. (2000) Catalysis of a Diels-Alder reaction by amidinium ions. The Journal of Organic Chemistry, 65, 1697-1701. 

The catalyzed generation of a chiral enolate equivalent, formed from an enal and a triazoHum-derived chiral V-heterocyclic car-bene, can undergo a hetero-Diels-Alderreaction withenones with excellent enantioselectivity and diastereoselectivity (eq 14, left side). Alternatively, the authors have previously shown that stronger bases, such as DBU, instead result in a homoenolate... 

Wasserman, a., Diels-AlderReactions, pp. 42,50, and52, Elsevier, London, 1965. 

Kresze, G. In 1,4 Cycloaddition Reactions, the Diels-AlderReaction in HeteixxycUc Synthesis, Hamer, J., Ed. Academic New York, 1967 p 453. 

M. Radi, V. Bernardo, B. Bechi, D. Castagnolo, M. Pagano, M. Botta, Tetrahedron Lett. 2009,50,6572-6575. Microwave-assisted organocatalytic multicomponent Knoevenagel/hetero Diels-Alderreaction for the synthesis of 2,3-dihydropyran[2,3-c]pyrazoles. 

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