Copper Mediated Formation of Carbon-Heteroatom Bonds Using Organoboron Reagents and Ultrasound
摘要:
This report summarizes research efforts focused on copper acetate mediated reactions to form new carbon-heteroatom bonds using organoboron reagents under ultrasound irradiation. The method involves the application of ultrasound irradiation to the Chan-Evans-Lam reaction to achieve O-arylation of phenols, N-arylation of anilines and indoles, and S-arylation of thiols. Ultrasound irradiation was found to decrease reaction times from 72 hours to 4 hours while improving the product yields an average of 20%(1) Representative C-O, C-N, and C-S coupling reactions were successfully scaled-up from the milligram to gram levels while maintaining good product yields offering potential applications in industrial processes.
Palladium-Catalyzed Carbon−Sulfur Cross-Coupling Reactions with Indium Tri(organothiolate) and Its Application to Sequential One-Pot Processes
作者:Jae-Young Lee、Phil Ho Lee
DOI:10.1021/jo801169h
日期:2008.9.19
tri(organothiolate) is an effective nucleophilic coupling partner in Pd-catalyzedC-Scross-coupling reactions to produce the functionalized sulfides in excellent yields with high atom efficiency and complete regio- and chemoselectivity. The present method was efficiently applied to the sequential one-pot processes composed of selective double C-Scross-coupling reactions and addition of allylindium or allenylindium
Cross-Coupling of Chloro(hetero)arenes with Thiolates Employing a Ni(0)-Precatalyst
作者:Paul H. Gehrtz、Valentin Geiger、Tanno Schmidt、Laura Sršan、Ivana Fleischer
DOI:10.1021/acs.orglett.8b03476
日期:2019.1.4
aryl chlorides and in situ generated aliphatic and aromatic thiolates is described. The employed on-cycle, air-stable defined Ni precatalysts allow for transformation of a broad scope of substrates. A variety of functional groups and heterocyclic motifs as well as structurally varied thiols are tolerated at unprecedented moderate catalyst loadings and reaction temperatures. Depending on reaction conditions
962. Search for spectral evidence of expansion of the valency shell of sulphur in aromatic sulphides
作者:A. Mangini、R. Passerini
DOI:10.1039/jr9560004954
日期:——
US4124370A
申请人:——
公开号:US4124370A
公开(公告)日:1978-11-07
Copper Mediated Formation of Carbon-Heteroatom Bonds Using Organoboron Reagents and Ultrasound
作者:George W. Kabalka、Bryan J. Musolino
DOI:10.3987/com-14-s(k)18
日期:——
This report summarizes research efforts focused on copper acetate mediated reactions to form new carbon-heteroatom bonds using organoboron reagents under ultrasound irradiation. The method involves the application of ultrasound irradiation to the Chan-Evans-Lam reaction to achieve O-arylation of phenols, N-arylation of anilines and indoles, and S-arylation of thiols. Ultrasound irradiation was found to decrease reaction times from 72 hours to 4 hours while improving the product yields an average of 20%(1) Representative C-O, C-N, and C-S coupling reactions were successfully scaled-up from the milligram to gram levels while maintaining good product yields offering potential applications in industrial processes.