Novel lincomycin derivatives are disclosed. These lincomycin derivatives exhibit antibacterial activity. The compounds of the subject invention may exhibit potent activities against bacteria, including Gram positive organisms, and may be useful antimicrobial agents. Methods of synthesis and of use of the compounds are also disclosed.
Nickel-Catalyzed Chemo- and Enantioselective Coupling between Cyclobutanones and Allenes: Rapid Synthesis of [3.2.2] Bicycles
作者:Xuan Zhou、Guangbin Dong
DOI:10.1002/anie.201609489
日期:2016.11.21
Herein an intramolecular nickel‐catalyzed (4+2) coupling between cyclobutanones and allenes, by C−C cleavage, is reported. The reaction provides a distinct approach for accessing [3.2.2] bicyclic scaffolds which are challenging to prepare through conventional approaches. The reaction is efficient, chemoselective, and pH/redox neutral. Room temperature conditions and low catalyst loadings can be adopted
Lewis Acid Catalyzed Formal Intramolecular [3 + 3] Cross-Cycloaddition of Cyclopropane 1,1-Diesters for Construction of Benzobicyclo[2.2.2]octane Skeletons
作者:Weiwei Ma、Jie Fang、Jun Ren、Zhongwen Wang
DOI:10.1021/acs.orglett.5b01927
日期:2015.9.4
A novel Lewis acid catalyzed formal intramolecular [3 + 3] cross-cycloaddition (IMCC) of cyclopropane 1,1-diesters has been successfully developed. This supplies an efficient and conceptually new strategy for construction of bridged bicyclo[2.2.2]octane skeletons. This [3 + 3]IMCC could be run up to gram scale and from easily prepared starting materials. This [3 + 3]IMCC, together with our previously
Palladium-Catalyzed Enantioselective Narasaka-Heck Reaction/Direct C−H Alkylation of Arenes: Iminoarylation of Alkenes
作者:Xu Bao、Qian Wang、Jieping Zhu
DOI:10.1002/anie.201705641
日期:2017.8.1
A palladium-catalyzedreaction of γ,δ-unsaturated oxime esters with oxadiazoles afforded dihydropyrroles in good to excellent yields through an intramolecular iminopalladation/intermolecular direct heteroarene C−H alkylation cascade. This unprecedented iminoarylation of alkenes was subsequently realized in an enantioselective manner in the presence of a chiral bidentate phosphine ligand (Synphos).
Intramolecular Hydroarylation of Arenes via Imidazole-Directed C–H Activation in Aqueous Methanol Using Rhodium(III) as the Catalyst and Mechanistic Study
作者:Nilotpal Sinha、Prasenjit Mistry、Sukanya Das、Tanmoy Datta、Brindaban Roy
DOI:10.1021/acs.joc.3c00689
日期:2023.7.7
A mild and greener approach for intramolecular regioselective hydroarylation is described for the efficient and elegant preparation of a number of dihydrobenzofurans and dihydrobenzo[b]thiophenes using imidazole as a directing group and Rh(III) as a catalyst. Moreover, the protocol may be extended to the formation of indoline and chromane derivatives. Deuterium scrambling experiments and characterization