非预功能化环状肟的新型光氧化还原-中性开环吡啶基化已通过磷酰基介导的 N O/C C 键断裂,然后进行自由基-自由基偶联来实现。这种温和的无酸、无碱和无氧化剂的方案提供了高度的位点选择性和高效的远端吡啶基化烷基腈,这些烷基腈可以按比例放大合成并很容易转化为骨架多样化的化合物。值得注意的是,通过氰基吡啶对高还原激发态光催化剂进行 SET 氧化而产生的氧化基态光催化剂可能会引发以下磷酰基介导的脱氧过程。
Catalyticenantioselective chemical reactions involving highly reactive radical species remain largely unexplored. We report herein for the first time a novel enantioselective radical ring-opening cyanation of redox-active oxime esters by dual photoreodox and copper catalysis. This mild protocol shows good functional group tolerance and broad substrate scope, producing a wide range of optically active
[EN] HYDROXY ISOXAZOLE COMPOUNDS USEFUL AS GPR120 AGONISTS<br/>[FR] COMPOSÉS D'HYDROXY ISOXAZOLE UTILES EN TANT QU'AGONISTES DE GPR120
申请人:MERCK SHARP & DOHME
公开号:WO2018107415A1
公开(公告)日:2018-06-21
The present invention relates to a compound represented by formula (I) : and pharmaceutically acceptable salts thereof are disclosed as useful for treating or preventing diabetes, hyperlipidemia, obesity, NASH, inflammation related disorders, and related diseases and conditions. The compounds are useful as agonists of the G-protein coupled receptor GPR120. Pharmaceutical compositions and methods of treatment are also included.
Copper-Catalyzed Enantioselective Arylation via Radical-Mediated C–C Bond Cleavage: Synthesis of Chiral ω,ω-Diaryl Alkyl Nitriles
作者:Guo-Qing Cui、Jing-Cheng Dai、Yan Li、Yuan-Bo Li、Duo-Duo Hu、Kang-Jie Bian、Jie Sheng、Xi-Sheng Wang
DOI:10.1021/acs.orglett.1c02725
日期:2021.10.1
The first example of copper-catalyzed ring-opening, enantioselective arylation of cyclic ketoxime esters to access ω,ω-diaryl alkyl nitriles has been developed in high yield (up to 92% yield) with excellent enantioselectivity (up to 91% ee). Side-arm bis(oxazoline) ligand plays a significant role in this asymmetric catalytic transformation, which provides an efficient route to construct diverse chiral
Cu-Catalyzed Redox-Neutral Ring Cleavage of Cycloketone <i>O</i>-Acyl Oximes: Chemodivergent Access to Distal Oxygenated Nitriles
作者:Wenying Ai、Yaqian Liu、Qian Wang、Zhonglin Lu、Qiang Liu
DOI:10.1021/acs.orglett.7b03707
日期:2018.1.19
chemodivergent copper-catalyzed ring opening of cycloketone oximes via radical-mediated C–C bond cleavage under redox-neutral conditions is described. This method allows the divergent synthesis of γ- and δ-acyloxylated, alkoxylated, and hydroxylated nitriles while avoiding the use of toxic cyanide reagents. Moreover, these reactions proceed under very mildconditions with good functional group tolerance
arylation reaction using α-aryl isopropenyl-tert-cyclobutanols has been developed. This reaction gives access to benzodiquinanes in moderate to good yields and tolerates alkyl-, alkoxy-, and halogen-substitutedaryl groups.