作者:Swapnil Nerkar、Dennis P. Curran
DOI:10.1021/acs.orglett.5b01101
日期:2015.7.17
(NHC-BF2Ar) by treatment with 2 equiv of 1-chloromethyl-4-fluoro-1,4-diazonia-bicyclo[2.2.2]octane bis(tetrafluoroborate) (Selectfluor). In turn, the NHC-difluoro(aryl)boranes participate directly in Suzuki reactions under conditions previously used for anionic trifluoroborate salts. Accordingly, NHC-difluoroboranes are a new class of stable precursors for Suzuki reactions.
通过使用2当量的1-氯甲基-4-氟-1,4处理,可以将现成的NHC-芳基硼烷(NHC-BH 2 Ar)高产率转化为稳定的NHC-二氟(芳基)硼烷(NHC-BF 2 Ar)。 -二氮杂双环[2.2.2]辛烷双(四氟硼酸酯)(Selectfluor)。反过来,在先前用于阴离子三氟硼酸盐的条件下,NHC-二氟(芳基)硼烷直接参与Suzuki反应。因此,NHC-二氟硼烷是铃木反应的一类新的稳定前体。