Arylmethanesulfonates are convenient latent phenols in the nucleophilic aromatic substitution reaction
作者:Christopher J. Dinsmore、C.Blair Zartman
DOI:10.1016/s0040-4039(99)00660-7
日期:1999.5
protecting group for a phenol is conveniently unmasked under the conditions of the SNAr reaction with an activated aryl halide, producing diarylether products directly. The method is advantageous when the preparation of a phenol substrate requires O-protection, since the selection of the robust methanesulfonate as a latent phenol obviates a deprotection step prior to the SNAr reaction.
苯酚的甲磺酰基保护基在S N Ar反应条件下与活化的芳基卤化物方便地被掩盖,直接生产二芳基醚产物。该方法是有利的,当一个酚基片的制备需要ø -防护,由于鲁棒甲磺酸盐作为潜苯酚消除脱保护之前,在S步骤的选择Ñ的Ar反应。
A Facile Route to<i>Ortho</i>-Hydroxyanilnes through an Ir<sup>III</sup>-Catalyzed Direct C−H Amidation of 2-Phenoxypyridines
作者:Lianhui Wang、Zi Yang、Mengqi Yang、Miaodou Tian、Changsheng Kuai、Xiuling Cui
DOI:10.1002/asia.201701028
日期:2017.10.5
A highly efficient and regioselective IrIII‐catalyzed C−H amidation of 2‐phenoxypyridines has been developed by using sulfonyl azides as an amino source. The amidated products were provided in good‐to‐excellent yields with broad functional‐group tolerance. Furthermore, the 2‐pyridyl moiety in the amidated products could be readily removed, thus offering an efficient route to synthetically useful ortho‐hydroxyanilnes
A highly regioselective reaction of<i>N</i>-fluoropyridinium salts with stabilized sulfur, oxygen, and nitrogen nucleophiles: A convenient route to 2-substituted pyridines
作者:Alexander S. Kiselyov、Lucjan Strekowski
DOI:10.1002/jhet.5570300530
日期:1993.10
2-Substitutedpyridines are efficiently obtained by the reactions of N-fluoropyridinium tetrafluoroborate or triflate with anions derived from benzenethiols, phenols, azoles, cyanamide, and with azide anion. The results are consistent with a nucleophile addition at the position 2 of the N-fluoropyridinium cation as the major reaction pathway.