An efficient diazo-transfer reaction of phenol is described. o-Quinone diazide (diazoquione) were synthesized from phenol by the diazo-transfer reaction using 2-azido-1,3-bis(2,6-diisopropylphenyl)imidazolium hexafluorophosphate (IPrAP), which is safe and stable crystalline, in MeOH in the presence of iPr2NH or DMAP. In addition, diazoquinones reacted with sodium azide smoothly in 2-methoxyethanol
Chemistry of 4-Alkylaryloxenium Ion “Precursors”: Sound and Fury Signifying Something?
作者:Michael Novak、Aaron M. Brinster、Jill N. Dickhoff、Jeremy M. Erb、Matthew P. Jones、Samuel H. Leopold、Andrew T. Vollman、Yue-Ting Wang、Stephen A. Glover
DOI:10.1021/jo701853e
日期:2007.12.1
reactive species in H2O. Comparisons with similarly reactive nitreniumions indicate that the lifetime of 1c is ca. 20−200 ps if it is generated, so it must react by a preassociation process. Density functional theory calculations at the B3LYP/6-31G*//HF/6-31G* level coupled with kinetic correlations also indicate that the aqueoussolutionlifetimes of 1a−c are in the picosecond range.
The construction of fully decorated 1,2,3-triazoles has been disclosed via a bimetallic relay-catalyzed cascade process combining azide–alkyne cycloaddition, C(sp2)–H functionalization of 1,2,3-triazoles and isocyanide insertion.