申请人:THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
公开号:US20150045580A1
公开(公告)日:2015-02-12
Selectively fluorinated molecules are important as materials, pharmaceuticals, and agrochemicals, but their synthesis by simple, mild, laboratory methods is challenging. We report a straightforward method for the cross-coupling of a difluoromethyl group with readily available reagents to form difluoromethylarenes. The reaction of electron-neutral, electronrich, and sterically hindered aryl and vinyl iodides with the combination of Cul, CsF and TMSCF
2
H leads to the formation of difluoromethylarenes in high yield with good functional group compatibility. This transformation is surprising, in part, because of the prior observation of the instability of CuCF
2
H.
有选择性氟化的分子对于材料、制药和农药非常重要,但是通过简单、温和的实验室方法合成它们是具有挑战性的。我们报告了一种直接的方法,通过交叉偶联二氟甲基基团和易得到的试剂形成二氟甲基芳烃。电子中性、富电子和空间位阻的芳基和乙烯基碘化物与Cul、CsF和TMSCF2H的组合反应可以高产率地形成二氟甲基芳烃,并具有良好的官能团兼容性。这种转化令人惊讶,部分原因是因为之前观察到CuCF2H的不稳定性。