Furanosteroid studies. Improved synthesis of the A,B,C,E-ring core of viridin
作者:Kristen C. Mascall、Peter A. Jacobi
DOI:10.1016/j.tetlet.2012.01.070
日期:2012.3
tetracyclic core skeleton of the furanosteroid viridin is prepared in nine steps from readily available materials. The key step in the synthesis is a facile acid-promoted cyclodehydration of an aryloxyketone to prepare the benzofuran moiety. From this intermediate, the known target skeleton is prepared in four steps. This new synthesis is a six-step improvement over the previously reported one.
呋喃类固醇viridiin的四环核心骨架是从容易获得的材料分九步制备的。合成中的关键步骤是芳基氧基酮的轻度酸促进的环脱水以制备苯并呋喃部分。从该中间体中,分四个步骤制备已知的目标骨架。这种新的合成方法比以前报告的方法有六步改进。