نتایج جستجو برای: chemoselective
تعداد نتایج: 1372 فیلتر نتایج به سال:
A high-speed, highly efficient chemoselective N-acylation by anhydride was achieved in the absence of catalyst for exothermic (DeltaH>0) and endothermic (DeltaH<0) acylation of various amines and anilines with the microreaction system of ambient water (micro-onH2O) and subcritical water (micro-subH2O), where the desired N-acylated products are chemoselectively obtained with high yield(s) and ex...
Preparation of new types of trisubstituted oxazoles is realized via chemoselective O-acylations and intramolecular Wittig reactions with ester functionalities using in situ formed phosphorus ylides as key intermediates. A plausible reaction mechanism for this undiscovered chemistry is also proposed based on the existence of expected and rearranged isomeric oxazoles.
Subnanometric cobalt nanoclusters covered by N-doped carbon layers (Co@NC-800) catalyze the chemoselective reduction of nitroarenes and one-pot synthesis secondary aryl amines isoindolinones in aquo media under mild reaction conditions.
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