1‐(bromoethynyl)arenes from 1,1‐dibromoalkenes. Differential reactivity of DBU in protic solvents as compared to aprotic solvents has been explored to prevent the formation of mixtures of products in this reaction. Hydrated DBU is found to be superior to dry DBU, both for the selective synthesis and ease of isolation. In addition, use of DBU⋅H2O as a non‐nucleophilic mild base allowed us to synthesise 1‐
1,8-二氮杂双环的亲核反应[5.4.0]十一碳-7-烯(
DBU)由一
水合物的形成完全被控制(
DBU⋅H 2 O)中的1-(
溴乙炔基)
芳烃1的合成, 1-二
溴代烯烃 已经研究了
DBU在质子溶剂中与非质子溶剂相比的差异反应性,以防止在该反应中形成产物混合物。发现
水合
DBU在选择性合成和易于分离方面均优于干
DBU。此外,使用
DBU·H 2 O作为非亲核性温和碱,可以使我们在无溶剂条件下通过反应合成1-(
溴乙炔基)
芳烃。
DBU·H 2的利用O作为唯一试剂,也使我们无需柱色谱纯化即可分离产物。