Zn(II)-Catalyzed One-Pot Synthesis of Coumarins from Ynamides and Salicylaldehydes
作者:Huen Ji Yoo、So Won Youn
DOI:10.1021/acs.orglett.9b01181
日期:2019.5.3
A highly efficient and straightforward synthesis of diversely substituted coumarins from ynamides and salicylaldehydes in the presence of Zn(II) catalyst has been developed. The sulfonamide moiety of ynamides was successfully recycled in this process, serving as an effective traceless directing group for high regioselectivity in the bond-forming event. The advantages of this protocol are good functional
已经开发了在Zn(II)催化剂存在下由酰胺和水杨醛高效高效地直接合成各种取代的香豆素的方法。在此过程中,成功地将了酰胺的磺酰胺部分进行了再循环,在形成键的过程中,它是有效的无痕导向基团,具有很高的区域选择性。该方案的优点是良好的官能团耐受性,宽泛的底物范围,简单且高产率的反应,磺酰胺的回收/重复使用,廉价催化剂的低催化剂负载量以及这些优点,使该方法更具成本效益且更环保。