Direct Synthesis of Tri‐/Difluoromethyl Ketones from Carboxylic Acids by Cross‐Coupling with Acyloxyphosphonium Ions
作者:Xanath Ispizua‐Rodriguez、Socrates B. Munoz、Vinayak Krishnamurti、Thomas Mathew、G. K. S. Prakash
DOI:10.1002/chem.202102854
日期:2021.11.17
Advantageous synthetic route: Deoxytrifluoromethylation and difluoromethylation of carboxylic acids give access to di- and trifluoromethyl ketones. The key to the success of these transformations is the use of acyloxyphosphonium ions prepared in situ as acyl electrophiles. The protocols use extremely mild reaction conditions and short reactions times and can tolerate a wide range of functional groups
有利的合成路线:羧酸的脱氧三氟甲基化和二氟甲基化得到二氟甲基酮和三氟甲基酮。这些转化成功的关键是使用原位制备的酰氧基鏻离子作为酰基亲电试剂。该方案使用极其温和的反应条件和较短的反应时间,并且可以容忍广泛的官能团。