Palladium-Catalyzed Carboiodination of Alkenes: Carbon−Carbon Bond Formation with Retention of Reactive Functionality
摘要:
We report a palladium-catalyzed carbon carbon bond-forming reaction between aryl iodides and alkenes. In contrast to traditional cross-coupling reactions, two new bonds are formed, and all of the atoms in the starting materials are incorporated into the product. The use of a palladium catalyst with bulky phosphine ligands is found to be crucial for reactivity.
Palladium-Catalyzed Three-Component Carbocarbonation of Arynes: Expeditious Synthesis of <i>o</i>-Alkylated Arylacrylates and Stilbenes
作者:Tuanli Yao、Jiazhe Hui、Tao Liu、Tao Li
DOI:10.1021/acs.joc.0c02994
日期:2021.4.16
A palladium-catalyzed multicomponentreactioninvolving olefin-tethered aryl iodides, arynes, and electrophilic alkenes has been developed for straightforward synthesis of o-alkylated arylacrylates and stilbenes through tandem intramolecular Heck cyclization/aryne dicarbofunctionalization.
ligand-controlled chemoselective synthesis of imides has been achieved. An orthogonal set of conditions has been developed for multicomponent reaction of various olefin-tethered aryl iodides, isocyanides, and carboxylic acids. Alkylimides (“cyclization on” products) via arylimidation of tethered unactivated alkenes and aryl imides (“cyclization off” products) via direct imidation of aryl iodides were
Based on the intramolecular Heck-type reaction, a convenient and efficient strategy to construct functionalized ynones by a palladium-catalyzed cascadeannulation reaction has been developed. This reaction possesses good functional group compatibility, a broad substrate scope, and high atom- and step-economy. Furthermore, this approach could also be extended to direct alkynylation that gave another
A novel palladium-catalyzedcascade carbopalladation/phenol dearomatization reaction has been achieved. The process provides a variety of indolone-, dihydrobenzofuran-, dihydrobenzopyran- and hydroquinoline-containing spirofused molecules bearing two quaternary centers in moderate to good yields. The potential synthetic utility of this method is demonstrated by a gram-scale experiment and further transformations
Pd-Catalyzed Sequential Formation of C–C Bonds: A New Strategy for the Synthesis of (<i>E</i>)-α,β-Unsaturated Carbonyl Compounds from Sulfoxonium Ylides and 1-Iodo-2-((2-methylallyl)oxy)benzene Compounds
α,β-Unsaturated carbonyl compounds are significant moieties in many biological molecules and have attracted considerable attention in organic synthetic chemistry. A Pd-catalyzed cascade cyclization for the synthesis of (E)-α,β-unsaturated carbonyl compounds with the sequential formation of C–C bonds was developed. This method offers high efficiency, good functional group tolerance, and moderate to
α,β-不饱和羰基化合物是许多生物分子中的重要组成部分,在有机合成化学中引起了相当大的关注。开发了 Pd 催化的级联环化反应,用于合成 ( E )-α,β-不饱和羰基化合物,并依次形成 C-C 键。该方法效率高、官能团耐受性好、产率中等至极好,通常显示出高立体选择性。