Double Cu‐Catalyzed Direct Csp<sup>3</sup>−H Azidation/CuAAC Reaction: A Direct Approach towards Demanding Triazole Conjugates
作者:Tobias Brandhofer、Aysegül Özdemir、Andrea Gini、Olga García Mancheño
DOI:10.1002/chem.201806288
日期:2019.3.15
The first one‐pot procedure for the double copper(I)‐catalyzed oxidative Csp3−H azidation–CuAAC process, implying unstable azide intermediates and easy‐to‐remove reagents under water‐tolerant conditions, is presented. The combination of tert‐butyl hydroperoxide as oxidant and TMSN3 as azide source for the C−H bond azidation, which produces harmless side‐products such as tBuOH and H2O, probed to be
The invention relates to carboxamide derivatives as defined in the specification and claims, to a process for their preparation, to pharmaceutical compositions comprising them and to their use as mGluR1 enhancers in the treatment and prevention of neurological disorders and diseases, such as Alzheimer's disease and dementia.
Electrochemical dehydrogenative cross-coupling of xanthenes with ketones
作者:Yong-Zheng Yang、Yan-Chen Wu、Ren-Jie Song、Jin-Heng Li
DOI:10.1039/d0cc02580a
日期:——
functionalized 9-alkyl-9H-xanthenes was developed. This method enables the formation of a new C(sp3)–C(sp3) bond through release of H2 as the major byproduct at room temperature, and features mild conditions, high atom economy, excellent functional-group tolerance, scalability and facile applications in pharmaceutical chemistry.
Electrochemically Mediated Direct C(
<i>sp</i>
<sup>3</sup>
)−H Sulfonylation of Xanthene Derivatives
作者:Wan‐Jie Wei、Yu‐Jing Zhong、Yu‐Feng Feng、Lei Gao、Hai‐Tao Tang、Ying‐Ming Pan、Xian‐Li Ma、Zu‐Yu Mo
DOI:10.1002/adsc.202101289
日期:2022.2.15
The construction of C(sp3)-sulfonyl bonds through directsulfonylation of C(sp3)−H bond presents a number of challenges, so an electrochemical oxidation-induced directsulfonylation of the xantheneC(sp3)−H bond was developed. Significant advantages of this method are high atom efficiency, functional group tolerance, transition metal- and oxidant-free conditions. The in vitro cytotoxicity of all product