Substituted Functional Olefins Through Lateral Sequential Lithiation/Silylation/Condensation of Tertiary Aromatic Amides: A Ligand for Phosphane-Free Palladium-Catalyzed Suzuki Coupling Reactions
sequential lithiation/silylation/condensation of tertiaryaromaticamides has been developed that provides an efficient method to build up functional olefins in good yields. In addition, we have established an efficient and simple method that involves UV/Vis, fluorescence, and NMR analyses, to detect the interaction between transition-metal salts and functional olefins containing tertiaryamides. This has
Direct Excitation of Aldehyde to Activate the C(
<i>sp</i>
<sup>
<i>2</i>
</sup>
)−H Bond by Cobaloxime Catalysis toward Fluorenones Synthesis with Hydrogen Evolution
highly reactive photoexcited triplet state of aromatic aldehyde intermediates is intercepted by the catalyst in the ground state, thus leading to the synthesis of a series of fluorenones, xanthones and thioxanthones in good to excellent yields without any external oxidants and with hydrogen as the byproduct.
已经成功开发了通过钴肟催化直接激发醛以激活其 C ( sp 2 )-H 键。在照射下,芳香醛中间体的高反应性光激发三重态被基态催化剂拦截,从而导致在没有任何外部氧化剂和氢作为副产品。
One-Pot Synthesis of Polycyclic Sultams Enabled by Gold-Catalyzed Hydroamination of <i>o</i>-Alkynylbenzenesulfonamides and Subsequent Iodine(III)-Mediated Counteranion-Assisted Intramolecular Annulation
作者:Lijun Zhang、Zhiguang Song
DOI:10.1021/acs.orglett.4c00294
日期:2024.3.22
Herein we present a facile and efficient one-pot synthetic protocol for the construction of polycyclic sultams. This protocol involves gold-catalyzed intramolecular hydroamination of o-alkynylbenzenesulfonamides followed by HTIB-mediated counteranion-assisted intramolecular annulation. The transformation tolerates a wide range of functional groups, resulting in the formation of highly functionalized