856381-01-6Relevant academic research and scientific papers
Decarboxylative Negishi Coupling of Redox-Active Aliphatic Esters by Cobalt Catalysis
Liu, Xu-Ge,Zhou, Chu-Jun,Lin,Han, Xiang-Lei,Zhang, Shang-Shi,Li, Qingjiang,Wang, Honggen
, p. 13096 - 13100 (2018)
A cobalt-catalyzed decarboxylative Negishi coupling reaction of redox-active aliphatic esters with organozinc reagents was developed. The method enabled efficient alkyl–aryl, alkyl–alkenyl, and alkyl–alkynyl coupling reactions under mild reaction conditions with no external ligand or additive needed. The success of an in situ activation protocol and the facile synthesis of the drug molecule (±)-preclamol highlight the synthetic potential of this method. Mechanistic studies indicated that a radical mechanism is involved.
On the para-selective chlorination of ortho-cresol
Bugnet, Emmanuelle A,Brough, Adrian R,Greatrex, Robert,Kee, Terence P
, p. 8059 - 8065 (2007/10/03)
Merrifield-bound o-cresol undergoes electrophilic aromatic chlorination using SO2Cl2 leading to para/ortho ratios in excess of 50, the highest such ratio reported for this chlorinating agent. Model studies suggest that this significant para/ortho ratio results not just from steric effects but that considerable electronic influence can be detected.
