Suzuki–Miyaura cross-coupling reaction of aryl and heteroaryl pinacol boronates for the synthesis of 2-substituted pyrimidines
作者:Shigehiro Asano、Seiji Kamioka、Yoshiaki Isobe
DOI:10.1016/j.tet.2011.10.057
日期:2012.1
Suzuki–Miyauracross-couplingreaction with 2-heteroarylboronic acids is generally challenging due to these acids easy decomposition. To overcome this problem, we developed a coupling method that uses 2-heteroaryl pinacol boronates in the presence of 1.0 mol % Pd(OAc)2 and 2.0 mol % S-Phos with 4 equiv amount of LiOH in dioxane and H2O at 80 °C for 30 min. This developed method allowed for the synthesis
Synthesis and Reactivity of α‐Cumyl Bromodifluoromethanesulfenate: Application to the Radiosynthesis of [
<sup>18</sup>
F]ArylSCF
<sub>3</sub>
作者:Jiang Wu、Qunchao Zhao、Thomas C. Wilson、Stefan Verhoog、Long Lu、Véronique Gouverneur、Qilong Shen
DOI:10.1002/anie.201813708
日期:2019.2.18
A highly reactive electrophilic bromodifluoromethylthiolating reagent, α-cumyl bromodifluoro-methanesulfenate 1, was prepared to allow for direct bromodifluoromethylthiolation of aryl boron reagents. This coupling reaction takes place under copper catalysis, and affords a large range of bromodifluoromethylthiolated arenes. These compounds are amenable to various transformations including halogen exchange
Single-Site Cobalt-Catalyst Ligated with Pyridylimine-Functionalized Metal–Organic Frameworks for Arene and Benzylic Borylation
作者:Rajashree Newar、Wahida Begum、Neha Antil、Sakshi Shukla、Ajay Kumar、Naved Akhtar、Balendra、Kuntal Manna
DOI:10.1021/acs.inorgchem.0c00747
日期:2020.8.3
also significantly more robust and active than its homogeneous control, highlighting the beneficial effect of active-site isolation within the MOF framework that prevents intermolecular decomposition. The experimental and computational studies suggested (pyrim•−)CoI(THF) as the activecatalytic species within the MOF, which undergoes a mechanistic pathway of oxidative addition, turnover limiting σ-bond
Metal-organic frameworks containing nitrogen-donor ligands for efficient catalytic organic transformations
申请人:The University of Chicago
公开号:US10647733B2
公开(公告)日:2020-05-12
Metal-organic framework (MOFs) compositions based on nitrogen donor-based organic bridging ligands, including ligands based on 1,3-diketimine (NacNac), bipyridines and salicylaldimine, were synthesized and then post-synthetically metalated with metal precursors, such as complexes of first row transition metals. Metal complexes of the organic bridging ligands could also be directly incorporated into the MOFs. The MOFs provide a versatile family of recyclable and reusable single-site solid catalysts for catalyzing a variety of asymmetric organic transformations. The solid catalysts can also be integrated into a flow reactor or a supercritical fluid reactor.