The present invention relates to new 5-alkenone-3,3-dimethyl-benzoxepines derivatives of formula (I), their use for the preparation of pentadienoic derivatives and their process of preparation.
本发明涉及式(I)的新型 5-烯酮-3,3-二甲基苯并氧杂
环庚烷衍
生物、它们在制备
戊二烯衍
生物中的用途及其制备工艺。