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Nitrogen Dioxide Catalyzed Aerobic Oxidative Cleavage of C(OH)–C Bonds of Secondary Alcohols to Produce Acids
Author(s) -
Liu Mingyang,
Zhang Zhanrong,
Song Jinliang,
Liu Shuaishuai,
Liu Huizhen,
Han Buxing
Publication year - 2019
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201908788
Subject(s) - chemistry , catalysis , radical , steric effects , bond cleavage , alcohol oxidation , oxidative phosphorylation , organic chemistry , decomposition , photochemistry , biochemistry
Stable organic nitroxyl radicals are an important class of catalysts for oxidation reactions, but their wide applications are hindered by their steric hinderance, high cost, complex operation, and separation procedures. Herein, NO 2 in DMSO is shown to effectively catalyze the aerobic oxidative cleavage of C(OH)−C bonds to form a carboxylic group, and NO 2 was generated in situ by decomposition of nitrates. A diverse range of secondary alcohols were selectively converted into acids in excellent yields in this transition‐metal‐free system without any additives. Preliminary results also indicate its applicability to depolymerize recalcitrant macromolecular lignin. Detail studies revealed that NO 2 from nitrates promoted the reaction, and NO 2 served as hydrogen acceptor and radical initiator for the tandem oxidative reaction.