为在胶束水相反应条件下以高周转率实现可持续的无铜Sonogashira交叉偶联,开发了一种可靠且通用的方案。通过使用市售的催化剂CataCXium A Pd G3和THF作为助溶剂,各种炔烃底物可以与多种芳基卤化物有效地交叉偶联,从而提高了收率并降低了催化剂的负载量。对反应参数进行了优化,以使该过程操作简单,可靠且可扩展。该方法可通过胶束水溶液反应条件获得二卤代底物的烷基化芳烃,杂环化合物和单官能化产物,并具有提高的选择性。
Synthesis of 4-sulfonatobenzylphosphines and their application in aqueous-phase palladium-catalyzed cross-coupling
作者:Jane N. Moore、Nicholas M. Laskay、Kevin S. Duque、Steven P. Kelley、Robin D. Rogers、Kevin H. Shaughnessy
DOI:10.1016/j.jorganchem.2014.11.011
日期:2015.2
readily separated from organic products and potentially reused. The synthesis of two new water-soluble ligand precursors, di-tert-butyl(4-sulfonatobenzyl)phosphonium and di-1-adamantyl(4-sulfonatobenzyl)phosphonium, are reported. The air-stable, zwitterionic phosphonium salts were prepared by the reaction of dialkylphosphines with ethyl 4-bromomethylbenzenesulfonate, which results in a one-pot alkylation
Efficient Synthesis of Biologically Interesting 3,4-Diaryl-Substituted Succinimides and Maleimides: Application of Iron-Catalyzed Carbonylations
作者:Saisuree Prateeptongkum、Katrin Marie Driller、Ralf Jackstell、Anke Spannenberg、Matthias Beller
DOI:10.1002/chem.201000369
日期:2010.8.16
A straightforward two‐step synthesis of trans‐3,4‐disubstituted succinimides through a palladium‐catalyzed Sonogashira reaction and an iron‐catalyzed double carbonylation is described. In situ oxidative dehydrogenation gave the corresponding 3,4‐diarylmaleimides. By starting from readily available aryl and heteroaryl halides, a variety of new analogues and derivatives of bioactive 3,4‐bisindolylmaleimides
Lipids as versatile solvents for chemical synthesis
作者:Ashot Gevorgyan、Kathrin H. Hopmann、Annette Bayer
DOI:10.1039/d1gc02311j
日期:——
Development of safe, renewable, cheap and versatile solvents is a longstanding challenge in chemistry. We show here that vegetable oils and related systems can become prominent solvents for organic synthesis. Suzuki–Miyaura, Hiyama, Stille, Sonogashira and Heck cross-couplings proceed with quantitative yields in a range of vegetable oils, fish oil, butter and waxes used as solvents. Appropriate methodologies
Chemistry in Water Reproducibility Study: Learnings from a Precompetitive, Multicompany Collaboration
作者:Richard J. Fox、J. Daniel Bailey、Jennifer Victoriano Obligacion、Niginia Borlinghaus、Wilfried M. Braje、Xiaoyong Li、Subha Mukherjee、Adeline Schoen、Timothy B. Towne、Stella Vukelić
DOI:10.1021/acs.oprd.3c00440
日期:2024.4.19
TPGS-750-M, to enable a multitude of synthetic transformations to be conducted in water, implementation of this methodology within the pharmaceutical industry has been relatively limited. In this paper, we will disclose the key results and learningsfrom a multicompanycollaboration focused on a reproducibilitystudy involving some of the most commonly used reaction types in the pharmaceutical industry