作者:S. Ganesh Babu、R. Sakthivel、N. Dharmaraj、R. Karvembu
DOI:10.1016/j.tetlet.2014.10.098
日期:2014.12
α-Arylation of β-diketones has been carried out over CuO/aluminosilicate catalyst under ligand-free condition. The reaction conditions were optimized with different solvents, bases, catalyst amounts, and temperatures using acetylacetone and 4-bromobenzaldehyde as a model system. The scope of the catalytic system was extended to include various substituted aryl halides. 27 examples were successfully
β-二酮的α-芳基化反应是在无配体条件下于CuO /铝硅酸盐催化剂上进行的。使用乙酰丙酮和4-溴苯甲醛作为模型系统,使用不同的溶剂,碱,催化剂量和温度优化反应条件。催化体系的范围扩大到包括各种取代的芳基卤化物。成功证明了27个实例,收率在55%至94%之间。在存在C–Cl键的情况下,C–Br键被区域选择性激活。类似地,在二苯甲酰基丙酮的存在下,乙酰丙酮被4-溴苯甲醛化学选择性芳基化。通过热过滤试验确认了催化剂的非均相性质。还发现该催化剂是可重复使用的。