Palladium-Catalyzed C(sp<sup>3</sup>)–H Nitrooxylation with <i>tert</i>-Butyl Nitrite and Molecular Oxygen
作者:Bo Li、Ye-Qiang Han、Xu Yang、Bing-Feng Shi
DOI:10.1021/acs.orglett.0c03794
日期:2020.12.18
Herein, we report a Pd(II)-catalyzed nitrooxylation of unactivated methyl C(sp3)–H bonds using commercial available and easily manageable tert-butyl nitrite as the precursor of ONO2 radical under aerobic conditions. Environmentally benign molecularoxygen is used to initiate the generation of active radical reactant; it is also used as the terminal oxidant. A broad range of nitrooxylated aliphatic
Pd/Cu-Catalyzed Cascade C(sp<sup>3</sup>)–H Arylation and Intramolecular C–N Coupling: A One-Pot Synthesis of 3,4-2<i>H</i>-Quinolinone Skeletons
作者:Han-Zhi Xiao、Wen-Shu Wang、Yu-Song Sun、Hao Luo、Bo-Wen Li、Xiao-Dong Wang、Wei-Li Lin、Fei-Xian Luo
DOI:10.1021/acs.orglett.9b00214
日期:2019.3.15
In this letter, we successfully explored a cascade Pd/Cu-catalyzed intermolecular C(sp3)–H arylation of amides and intramolecular C–N coupling reaction. This method provides a one-pot strategy to synthesize 3,4-2H-quinolinone with good regioselectivity of C–H arylation and C–N coupling from C–I and C–X bonds from readily available starting materials.
Synthesis of Oxazolines from Amides via Palladium-Catalyzed Functionalization of Unactivated C(sp<sup>3</sup>)–H Bond
作者:Bo Li、Si-Qing Wang、Bin Liu、Bing-Feng Shi
DOI:10.1021/acs.orglett.5b00151
日期:2015.3.6
enables the expeditious synthesis of oxazolines from amides via Pd-catalyzed C(sp3)–H functionalization has been described. Preliminary studies indicate that the reaction might go through a chlorination/nucleophilic cyclization sequence, and the high efficiency of this sequence is enhanced by the in situ cyclative capture of the chlorinated intermediate. The resulting oxazolines can be further converted