Lanthanum(III)-Catalyzed Three-Component Reaction of Coumarin-3-carboxylates for the Synthesis of Indolylmalonamides and Analysis of Their Photophysical Properties
作者:Julia J. Jennings、Chinmay P. Bhatt、Annaliese K. Franz
DOI:10.1021/acs.joc.6b00541
日期:2016.8.5
First, the scandium(III)-catalyzed addition of diverse nucleophiles (e.g., indoles, N,N-dimethyl-m-anisidine, 2-ethylpyrrole, and 2-methylallylsilane) to coumarin-3-carboxylates has been developed to afford chromanone-3-carboxylates in high yields as a single diastereomer. Upon investigating a subsequent lanthanum(III)-catalyzed amidation reaction, a new multicomponent reaction was designed by bringing
已经开发了用于路易斯酸催化的丙二酰胺合成的新方法。首先,the(III)催化添加各种亲核试剂(例如吲哚,N,N-二甲基-m-苯甲醚,2-乙基吡咯和2-甲基烯丙基硅烷)生成香豆素3-羧酸盐,以高收率得到单价非对映异构体的苯并二氢吡喃酮3-羧酸盐。在研究了随后的镧(III)催化的酰胺化反应后,通过将香豆素3-羧酸盐与吲哚和胺混合在一起,设计了一种新的多组分反应,从而得到了吲哚基丙二酰胺,这些化合物被证明具有荧光特性。分析了所选化合物的光物理性质,包括量子产率,摩尔吸收率和斯托克斯位移。对三组分反应的反应平衡网络中涉及的几种反应副产物的综合研究为该方法的发展提供了机械学的见解。