The synthesis of original structures for the fragrance industry bearing bicyclic scaffolds is described. To the best of our knowledge, these structures are not found in the fragrance industry, neither from natural nor synthetic pathways. NHC–gold-type catalysts showed excellent activities leading to light bicyclic enol ethers. Several bicyclic adducts were prepared in good to excellent yields (18–99%). Evaluation of NHC–Au complexes allowed to reach a TOF of 300 h–1. The evaluation for the organoleptic properties of [4.1.0]-bicyclic ethers were compared with the unprecedented properties of the 1,6-enyne precursors. Evaluations of starting materials showed a great interest in these structures with various olfactory facets. In this study, we depicted the similarity and differences between starting ethers and their cycloisomerized bicyclic counterparts.

中文翻译：

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氧系 1,6-烯炔和 [4.1.0]-双环醚骨架作为香料工业的享乐材料

描述了带有双环支架的香料工业原始结构的合成。据我们所知，这些结构在香水行业中未发现，无论是来自天然途径还是合成途径。NHC-金型催化剂表现出优异的活性，可生成轻质双环烯醇醚。制备了几种双环加合物，产率非常好（18-99%）。NHC-Au 复合物的评估允许达到 300 h-1 的 TOF。[4.1.0]-双环醚的感官特性评估与 1,6-烯炔前体前所未有的特性进行了比较。对起始材料的评估显示出对这些具有各种嗅觉面的结构的极大兴趣。在这项研究中，