The range of variations, in terms of functionality and oxidation level, which has been developed for Diels-Alder dienophiles has not been paralleled for the dienic components. l The major structural modification for the dienes has been realized by manipulation of their alkylation level (cf. 1, 3-butadiene, alkylated butadienes, cycloalkadienes, anthracenes, etc.). Also, the I-and 3-alkoxydiene derivatives are very important in that they are more ...
