Aerobic Oxidation of Alkyl 2-Phenylhydrazinecarboxylates Catalyzed by CuCl and DMAP
作者:Min Hye Kim、Jinho Kim
DOI:10.1021/acs.joc.7b03119
日期:2018.2.2
various fruitful organic reactions such as a catalytic Mitsunobu reaction were reported by virtue of alkyl 2-phenylazocarboxylates, however, the synthesis of alkyl 2-phenylazocarboxylates largely depended on the stoichiometric use of toxic oxidants. In this manuscript, an environment-friendly aerobic oxidative transformation of alkyl 2-phenylhydrazinecarboxylates to alkyl 2-phenylazocarboxylates is
A RhIII‐catalyzed C–H activation/cyclativecaptureapproach, involving a nucleophilic addition of C(sp3)–Rh species to polarized double bonds is reported. This constitutes the first intermolecular catalytic method to directly access 1‐aminoindolines with a broad substituent scope under mild conditions.
A redox‐neutral cobalt(III)‐catalyzed synthetic approach for the direct synthesis of unprotected indoles showcasing an N−Nbondcleavage is reported. The herein newly introduced Boc‐protected hydrazines establish a beneficial addition to the limited portfolio of oxidizing directing groups for cobalt(III) catalysis. Moreover, the developed catalytic methodology tolerates a good variety of functional
Synthesis of Hydrazines via Radical Generation and Addition of Azocarboxylic <i>tert</i>-Butyl Esters
作者:Chen-Hao Ru、Shi-Huan Guo、Gao-Fei Pan、Xue-Qing Zhu、Ya-Ru Gao、Yong-Qiang Wang
DOI:10.1021/acs.orglett.8b00448
日期:2018.4.6
A new chemistry of azo compounds that is a radical generation and addition in situ of azocarboxylic tert-butyl esters to synthesize hydrazines has been described. The protocol provides a novel strategy for the synthesis of various hydrazines. The advantages of the transformation include broad substrate scope, benign conditions, and convenient operation.
Continuous flow synthesis of arylhydrazines <i>via</i> nickel/photoredox coupling of <i>tert</i>-butyl carbazate with aryl halides
作者:Alejandro Mata、Duc N. Tran、Ulrich Weigl、Jason D. Williams、C. Oliver Kappe
DOI:10.1039/d0cc06787c
日期:——
Nickel/photoredox catalyzed C–N couplings of hydrazine-derived nucleophiles provide a powerful alternative to Pd-catalyzed methods. This continuous-flowphotochemical protocol, optimized using design of experiments, achieves these couplings in short residence times, with high selectivity. A range of (hetero)aryl bromides and chlorides are compatible and understanding of process stability/reactor fouling