An environmentally benign microwave-assisted solvent-free self-condensation of carbonyl compounds was developed using catalytic amounts of triethylamine and lithium perchlorate. Changing the amount of lithium perchlorate helps in controlling the ratio of the single-condensation and double-condensation products. The effect of other additives and microwave activation was also investigated. The optimized conditions were then applied to various cyclic/acyclic ketones and aldehydes, with selectivity observed in many cases.
利用催化量的
三乙胺和
高氯酸锂,开发了一种无害环境的微波辅助无溶剂羰基化合物自缩合技术。改变
高氯酸锂的用量有助于控制单缩合产物和双缩合产物的比例。此外,还研究了其他添加剂和微波活化的影响。然后将优化的条件应用于各种环状/环状酮和醛,在许多情况下都观察到了选择性。