Stereospecific Nickel-Catalyzed Cross-Coupling Reactions of Alkyl Grignard Reagents and Identification of Selective Anti-Breast-Cancer Agents
作者:Ivelina M. Yonova、A. George Johnson、Charlotte A. Osborne、Curtis E. Moore、Naomi S. Morrissette、Elizabeth R. Jarvo
DOI:10.1002/anie.201308666
日期:2014.2.24
Alkyl Grignard reagents that contain β‐hydrogen atoms were used in a stereospecific nickel‐catalyzed cross‐coupling reaction to form C(sp3)C(sp3) bonds. Aryl Grignard reagents were also utilized to synthesize 1,1‐diarylalkanes. Several compounds synthesized by this method exhibited selective inhibition of proliferation of MCF‐7 breast cancer cells.
developed to synthesize biaryls from substituted acetophenones, phenylacetones, dihydrochalcone, and 2-acetylnaphthalene in reasonably good yields at room temperature via a domino reaction sequence of AlCl3catalyzed cyclization, dehydration, and then oxidation.
Prenol and isoprenoids are common structural motifs in biological systems and possess diverse applications. An unprecedented direct catalytic prenylation of ketonesusing prenol is attained. This C–C bond formation reaction requires only a ruthenium pincer catalyst and a base, and H2O is the only byproduct.
异戊二烯和类异戊二烯是生物系统中常见的结构基序,具有多种应用。实现了使用异戊烯醇对酮进行前所未有的直接催化异戊二烯化。这种 C–C 键形成反应只需要一种钌钳形催化剂和一种碱,而 H 2 O 是唯一的副产物。
Radical Aza-Cyclization of α-Imino-oxy Acids for Synthesis of Alkene-Containing <i>N</i>-Heterocycles via Dual Cobaloxime and Photoredox Catalysis
作者:Jia-Lin Tu、Jia-Li Liu、Wan Tang、Ma Su、Feng Liu
DOI:10.1021/acs.orglett.0c00224
日期:2020.2.7
Nitrogen-containing heterocycles are prevalent in both naturally and synthetically bioactive molecules. We report herein an unprecedented protocol for radical aza-cyclization of α-imino-oxy acids with pendant alkenes via synergistic photoredox and cobaloxime catalysis. With or without alkenes as the intermolecular cross-coupling partners, the transformation provides a variety of corresponding alkene-containing dihydropyrrole