Sir: Recently our laboratory has been investigating the preparation and use of new dienes for Diels-Alder reactions. The dienes are so arranged as to impart to their cycloadducts ready-made handles for the elaboration of functionality which is otherwise difficultly accessible. Toward this end, we have prepared and demonstrated the utility of enophiles 11- 3 and 2.4 In the consequence of its overall cycloaddition with olefins, diene 1 is a ...
