The employment of 2‐amino substituted 1,3‐dienes in cycloaddition reactions has recently extended the scope of Diels‐Alder methodologies. In this review, the preparation of a variety of 2‐amino‐1,3‐dienes is presented, and the use of these cross conjugated enamines in normal as well as hetero Diels‐Alder reactions is depicted. Diastereo‐ and enantioselective variations show new aspects for the preparation of cyclic carbonyl compounds in a highly stereoselective fashion. Further cyclisation reactions e.g. cyclopropanation reactions are also considered in this account.
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Enders et al. (1996) studied this question.
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