Reactions of 1,1,2,2-tetrafluoroethyl-N,N-dimethylamine with linear and cyclic 1,3-diketones
作者:Liane M. Grieco、Gary A. Halliday、Christopher P. Junk、Steven R. Lustig、William J. Marshall、Viacheslav A. Petrov
DOI:10.1016/j.jfluchem.2011.06.011
日期:2011.12
On the other hand, 1,3-diketones were found to undergo fluorination with TFEDMA. In the case of linear 1,3-diketones, the proposed mechanism involves the formation of β-fluoro-α,β-unsaturated ketones followed by the addition of HF to selectively give the product β,β-difluoroketone. Interestingly, when the 1,3-diketone is cyclic (i.e. 1,3-cyclohexadione) the outcome of the reaction is different and results
已知酮对α-氟胺如石川试剂或1,1,2,2-四氟乙基-N,N-二甲基胺(TFEDMA)不具有反应性。另一方面,发现1,3-二酮用TFEDMA进行氟化。在线性1,3-二酮的情况下,所提出的机理包括形成β-氟-α,β-不饱和酮,然后加入HF以选择性地产生产物β,β-二氟酮。有趣的是,当1,3-二酮是环状的(即1,3-环己二酮)时,反应的结果是不同的,并导致在2-碳上形成具有2,2-二氟乙酰基的产物。