A facile and solvent-free microwave-assisted approach to quinoline was developed by utilizing both acrolein diethyl acetal and aniline as reagents, firstly employing Ni/Beta zeolite as mild, ecofriendly and low-cost solid catalyst. As high as 83% yield of quinoline was quickly achieved at a short microwave time. The results indicated that the effect of Ni on Beta zeolite not only significantly promoted conversion of acrolein diethyl acetal to effective intermediate but also dramatically accelerated dehydrogenation rate of tetrahydroquinoline/dihydroquinoline to quinoline.

中文翻译：

---

Ni / Beta催化剂高效微波辅助从丙烯醛二乙缩醛和苯胺合成喹啉

以丙烯醛二乙缩醛和苯胺为试剂，开发了一种简便，无溶剂的微波辅助喹啉方法，首先使用镍/β沸石作为温和，环保和低成本的固体催化剂。在短时间内微波快速达到了高达83％的喹啉收率。结果表明，Ni对β沸石的作用不仅显着促进了丙烯醛二乙缩醛向有效中间体的转化，而且还大大促进了四氢喹啉/二氢喹啉向喹啉的脱氢速率。