Solid state aldol reactions of solvated and unsolvated lithium pinacolone enolate aggregates
作者:Huan Pang、Paul G. Williard
DOI:10.1016/j.tet.2019.130913
日期:2020.2
unsolvated lithium pinacolone enolate with a variety of solid aromatic aldehydes utilizing a mortar and pestle condition in comparison with the simple ball milling condition or tetrahydrofuran (THF) solution condition. In solution, the reactions are highly-selective with the aldol condensation product at room temperature. Under the condition of mortar and pestle, the reactions with unsolvated lithium pinacolone
我们报道了使用研钵和研棒条件与简单球磨条件或四氢呋喃(THF)溶液条件相比,溶剂化和未溶剂化的频哪酮烯醇酸锂与多种固体芳族醛的固态羟醛反应的首次系统研究。在溶液中,在室温下,该反应对于醛醇缩合产物是高度选择性的。在研钵和研杵的条件下,与未溶解的频哪酮烯醇化锂的反应在室温下显示出羟醛缩合产物和羟醛加成产物的混合物。通过使用溶剂化的频哪酮烯醇化锂,对于大多数底物而言获得了更高的产率。此外,在简单的开球条件下重复反应,而无需在室温下采取其他预防措施,