The heterogeneous system TBD/Al2O3 is an efficient catalyst for the intermolecular aldol reaction between ketones and aromatic aldehydes. This system operates with low catalysts loading (10%), in water or organic solvents, and with short reaction times. The desired aldol products are rendered cleanly. Experiments confirmed that this aldol protocol is reversible, and allowed for the preparation of dynamic combinatorial libraries (DCLs) of interconverting aldols. Analysis of these DCLs showed up how properties such as diastereoselectivity can emerge unpredictably from the library when it is considered as a whole.
异质体系TBD/
Al2O3是一种高效的催化剂,用于酮和芳香醛之间的分子间羟醛反应。该体系在
水或有机溶剂中,以低催化剂负载量(10%)运行,并具有短的反应时间。所期望的羟醛产物得到清晰呈现。实验证实,这种羟醛反应方案是可逆的,并允许制备动态组合库(DCLs),其中的羟醛可以相互转化。对这些DCLs的分析表明,当将整个库作为一个整体来考虑时,诸如非对映选择性等性质可以不可预测地从库中涌现。