One-pot synthesis of useful heterocycles in medicinal chemistry using a cascade strategy
作者:Guiyong Wu、Weiyu Yin、Hong C. Shen、Yong Huang
DOI:10.1039/c2gc16457d
日期:——
To access useful heterocycles in medicinal chemistry such as pyridazinones, dihydropyrimidinones, and dihydropyrimidinthiones, a “green” mild and highly efficient one-pot triple cascade was developed involving a Claisen–decarboxylation, electrophilic reaction, and subsequent heterocyclization. In addition, indazoles and benzofurans could also be constructed via a double cascade. To develop the cascade process, a direct Claisen–decarboxylation reaction was firstly optimized. This reaction can then couple with electrophilic reactions including alkylation, Michael addition or aldol reaction to enable the preparation of various aryl ketones in a one-pot fashion.
为了在药物化学中获得有用的杂环化合物,如吡嗪酮、二氢嘧啶酮和二氢嘧噻啶酮,开发了一种“绿色”的温和且高效的一锅三重级联反应,包括克莱森脱羧反应、电亲和反应以及随后的杂环化反应。此外,还可以通过双重级联反应构建吲哚并和苯并呋喃。为了开发这个级联过程,首先对直接的克莱森脱羧反应进行了优化。该反应随后可以与包括烷基化、米哈伊尔加成或醛醇反应在内的电亲和反应耦合,从而能够以一锅法制备各种芳基酮。