Editing Diels–Alder reaction (section)

===Asymmetric Diels–Alder===
Many methods have been developed for influencing the stereoselectivity of the Diels–Alder reaction, such as the use of chiral auxiliaries, catalysis by [[chiral Lewis acid]]s,<ref name="shaw">{{cite journal|first1=James D. |last1=White |first2=Subrata |last2=Shaw |title=cis-2,5-Diaminobicyclo[2.2.2]octane, a New Scaffold for Asymmetric Catalysis via Salen−Metal Complexes |journal= [[Organic Letters|Org. Lett.]] |volume=13 |issue=9 |pages=2488–91 |date=2011 |doi=10.1021/ol2007378|pmid=21462988 }}</ref> and [[Organocatalysis|small organic molecule catalysts]].<ref name=cb474/> [[Evans auxiliaries|Evans' oxazolidinones]],<ref>{{cite journal |last1=Evans |first1=D. A. |last2=Chapman |first2=K. T. |last3=Bisaha |first3=J. |year=1988 |title=Asymmetric Diels–Alder cycloaddition reactions with chiral α,β-unsaturated N-acyloxazolidinones |journal=Journal of the American Chemical Society |volume=110 |issue=4 |pages=1238–1256 |doi=10.1021/ja00212a037}}</ref> [[(R)-2-Methyl-CBS-oxazaborolidine|oxazaborolidines]],<ref>{{cite journal |last1=Corey |first1=E. J. |last2=Loh |first2=T. P. |year=1991 |title=First application of attractive intramolecular interactions to the design of chiral catalysts for highly enantioselective Diels–Alder reactions |journal=Journal of the American Chemical Society |volume=113 |issue=23 |pages=8966–8967 |doi=10.1021/ja00023a066}}</ref><ref>{{cite journal |last1=Corey |first1=E. J. |last2=Shibata |first2=T. |last3=Lee |first3=T. W. |year=2002 |title=Asymmetric Diels-Alder reactions catalyzed by a triflic acid activated chiral oxazaborolidine |journal=Journal of the American Chemical Society |volume=124 |issue=15 |pages=3808–3809 |doi=10.1021/ja025848x |pmid=11942799}}</ref><ref>{{cite journal |last1=Ryu |first1=D. H. |last2=Corey |first2=E. J. |year=2003 |title=Triflimide activation of a chiral oxazaborolidine leads to a more general catalytic system for enantioselective Diels-Alder addition |journal=Journal of the American Chemical Society |volume=125 |issue=21 |pages=6388–6390 |doi=10.1021/ja035393r |pmid=12785777}}</ref> [[bisoxazoline ligand|''bis''-oxazoline]]–copper [[chelate]]s,<ref>{{cite journal |last1=Johnson |first1=J. S. |last2=Evans |first2=D. A. |year=2000 |title=Chiral bis(oxazoline) copper(II) complexes: Versatile catalysts for enantioselective cycloaddition, Aldol, Michael, and carbonyl Ene reactions |journal=Accounts of Chemical Research |volume=33 |issue=6 |pages=325–335 |doi=10.1021/ar960062n |pmid=10891050}}</ref> [[imidazoline]] catalysis,<ref>{{cite journal |last1=Ahrendt |first1=K. A. |last2=Borths |first2=C. J. |last3=MacMillan |first3=D. W. C. |year=2000 |title=New Strategies for Organic Catalysis: The First Highly Enantioselective Organocatalytic Diels−Alder Reaction |journal=Journal of the American Chemical Society |volume=122 |issue=17 |pages=4243–4244 |doi=10.1021/ja000092s}}</ref> and many other methodologies exist for effecting diastereo- and enantioselective Diels–Alder reactions.