Decarboxylative [4+2] annulation of arylglyoxylic acids with internal alkynes using the anodic ruthenium catalysis
作者:Mu-Jia Luo、Ting-Ting Zhang、Fang-Jun Cai、Jin-Heng Li、De-Liang He
DOI:10.1039/c9cc03210j
日期:——
A new electrochemical decarboxylative [4+2] annulation of arylglyoxylic acids with internal alkynes involving C–H functionalization by means of a cooperative anode and ruthenium catalysis is presented. This reaction represents a mechanistically novel strategy as an ideal supplement to the decarboxylative [4+2] annulation methodology by employing an electrooxidative process to avoid the use of an additional
提出了一种新的芳基乙醛酸与内部炔烃的电化学脱羧[4 + 2]环合反应,涉及通过协同阳极和钌催化的C–H官能化。通过采用电氧化工艺避免使用额外的外部氧化剂并利用H 2 O作为要结合的羧基氧原子源,该反应代表了一种机械新颖的策略,是脱羧[4 + 2]环化方法的理想补充在合成1 H -isochromen-1-ones中。
Reductive carboxylation of aromatic esters by electron transfer from magnesium metal
作者:Hirofumi Maekawa、Hikaru Okawara、Taro Murakami
DOI:10.1016/j.tetlet.2016.12.001
日期:2017.1
Magnesium-promoted reductive carboxylation of ethyl benzoate in the presence of chlorotrimethylsilane in N,N-dimethylformamide brought about a new carbon-carbon bond formation between the carbonyl carbon atom and carbon dioxide to give the corresponding benzoylformic acid in good yield. It is noteworthy that only ethyl benzoates with substituents at the meta-position were converted into benzoylformic
The present disclosure provides compositions for in vivo imaging of hydrogen peroxide; and methods for detecting hydrogen peroxide in vivo. The compositions and methods find use in various diagnostic applications, which are also provided.
A Hydrogen Peroxide-Responsive Hyperpolarized <sup>13</sup>C MRI Contrast Agent
作者:Alexander R. Lippert、Kayvan R. Keshari、John Kurhanewicz、Christopher J. Chang
DOI:10.1021/ja111589a
日期:2011.3.23
reaction-based approach for the detection of hydrogen peroxide (H(2)O(2)) usinghyperpolarized (13)Cmagneticresonance imaging ((13)C MRI) and the H(2)O(2)-mediated oxidation of α-ketoacids to carboxylic acids. (13)C-Benzoylformic acid reacts selectively with H(2)O(2) over other reactive oxygen species to generate (13)C-benzoic acid and can be hyperpolarizedusing dynamic nuclear polarization, providing