Optimization of Manganese Coupling Reaction for Kilogram-Scale Preparation of Two Aryl-1,3-dione Building Blocks
作者:Tomas Smejkal、Vijayagopal Gopalsamuthiram、Sujit K. Ghorai、Anup M. Jawalekar、Dinesh Pagar、Krishna Sawant、Srinivas Subramanian、Jonathan Dallimore、Nigel Willetts、James N. Scutt、Louisa Whalley、Matthew Hotson、Anne-Marie Hogan、George Hodges
DOI:10.1021/acs.oprd.7b00241
日期:2017.10.20
acetyl-CoA carboxylase (ACCase) inhibitors. The original synthesis of this structural motif employed in the research phase involved a selenium oxide mediated oxidation, the use of diazoacetate and aryl lead reagents, and a low temperature oxidation of an aryl lithium intermediate, so it was not well suited to large scale synthesis. For kilogram scale synthesis of the two aryl-1,3-dione building blocks
芳基-1,3-二酮代表一种有前途的新型除草乙酰辅酶A羧化酶(ACCase)抑制剂。在研究阶段采用的这种结构基序的原始合成涉及氧化硒介导的氧化,重氮乙酸盐和芳基铅试剂的使用以及芳基锂中间体的低温氧化,因此不适用于大规模合成。对于公斤级合成的两个1,3-芳基芳基结构单元(3和4),我们开发了一种替代方法,该方法采用了锰或锰-铜催化的烷基格利雅(Grignard)偶联和环氧的半频哪醇重排作为关键步骤。作为合成2-烷基取代的苯甲醛和2-芳基-1,3-二酮的可扩展方法,最优化条件可能是普遍感兴趣的。