Sulfated polyborate: mild, efficient and eco-friendly catalyst for the synthesis of 2,3-dihydroquinazolin-4(1H)-ones
作者:Chetan K. Khatri、Manisha S. Patil、Ganesh U. Chaturbhuj
DOI:10.1007/s13738-017-1109-x
日期:2017.8
efficient, inexpensive and recyclable sulfated polyborate catalyst was applied in a three-component, one-pot cyclocondensation of isatoic anhydride, aldehydes and ammonium acetate/amines to afford the corresponding 2,3-dihydroquinazolin-4(1H)-ones. The key advantages of the present method are high yields, short reaction time, easy workup, recyclability of catalyst and ability to tolerate a variety of
摘要将有效,廉价和可回收的硫酸化多硼酸盐催化剂应用于三酸酐,一锅法的等角酸酐,醛和乙酸铵/胺的缩合反应,得到相应的2,3-二氢喹唑啉-4(1 H)-一。本方法的主要优点是产率高,反应时间短,后处理容易,催化剂的可回收性和耐受各种官能团的能力,这带来了经济上和生态上的回报。 图形概要