The palladium and copper contrast: a twist to products of different chemotypes and altered mechanistic pathways
作者:Kapileswar Seth、Sudipta Raha Roy、Asim Kumar、Asit K. Chakraborti
DOI:10.1039/c6cy00415f
日期:——
Unprecedented Pd–Ag/Cu–Ag nanocluster-catalyst switch leads to a phenazine/azoarene twist for non-radical mode C–H activation vs. radical mode N–N self-coupling of anilines.
Decomposition pathways and mitigation strategies for highly-stable hydroxyphenazine flow battery anolytes
作者:Nadeesha P. N. Wellala、Aaron Hollas、Kaining Duanmu、Vijayakumar Murugesan、Xin Zhang、Ruozhu Feng、Yuyan Shao、Wei Wang
DOI:10.1039/d1ta03655f
日期:——
undergoes desulfonation and reduction of a phenolic C–O bond to yield a mixture of 7/8-hydroxyphenazine-2-sulfonic acid, as well as hydrogenation of the aromatic ring system. Density functional theory (DFT) analysis of the charged DHPS, its ring-hydrogenated products, and variably substituted hydroxy phenazines has led to the development of a series of dihydroxylated phenazine isomers which provide insight
4-nitroalkoxybenzenes 7 and PCl3/AlCl3, when carried out in appropriate molar ratio, gives a prevalent formation of diazenes 8 and 2,7-dialkoxyphenazines 9 with their new chlorinated derivatives 10–13. These compounds are obtained, in satisfactory yield, in a one-pot procedure, in mild conditions, from commercially available and safe starting materials. In this reaction both the reagents PCl3 and AlCl3 play a fundamental
LDA-promoted decomposition of benzenesulfenamides. A route to aminyl radicals by dioxygen oxidation of lithium amides
作者:Anna Barbieri、Pier Carlo Montevecchi、Daniele Nanni、Maria Luisa Navacchia
DOI:10.1016/0040-4020(96)00799-5
日期:1996.10
The LDA-promoted decomposition of N-monosubstituted sulfenamides 1a-d occurs through the formation of thioaminyl anions, which undergo oxidation either at sulfur, with formation of sulfonamides, or at nitrogen, with formation of thioaminyl radicals, depending on the nature of the 4′-substituent. The reaction of N,N-disubstituted sulfenamides 1e-h proceeds through the intermediacy of a lithium complex
Water at elevated temperatures (WET): reactant, catalyst, and solvent in the selective hydrolysis of protecting groups
作者:Wilmarie Medina-Ramos、Mike A. Mojica、Elizabeth D. Cope、Ryan J. Hart、Pamela Pollet、Charles A. Eckert、Charles L. Liotta
DOI:10.1039/c3gc42569j
日期:——
WET has been successfully employed in the removal of protectinggroups alleviating the need for added strong acids/bases, subsequent neutralization and waste salt elimination. The protocols for the water-mediated removal of several common protectinggroups such as tert-butyl carbamates (N-Boc) from 125 to 150 °C, acetamide (N-Ac) at 275 °C and acetate esters (O-Ac) at 250 °C are reported for different