The reduction of aromatic nitro groups on solid supports using sodium hydrosulfite (Na2S2O4)
作者:Randall A Scheuerman、David Tumelty
DOI:10.1016/s0040-4039(00)00959-x
日期:2000.8
An improved method for reducing aromatic nitro compounds on solid-phase supports usingsodium hydrosulfite is presented. Conditions have been optimized to enable the use of this reagent for reductions on both polyethyleneglycol-polystyrene (PEG) resins and traditional polystyrene (PS) resins.
The present invention relates to a process for the preparation of carboxamide derivatives of formula (I) as described herein starting from a pyrazole carbonyl derivative and an amine in absence of an additional acid acceptor.