Reaction pathways for arylcarbamoyl radicals and the cyclization of o-substituted phenylcarbamoyl radicals
作者:Rino Leardini、Antonio Tundo、Giuseppe Zanardi
DOI:10.1039/p19810003164
日期:——
in the aromatic ring. When the aryl group is phenyl or p-chlorophenyl the following reactions on carbamoyl radicals occur: (i) loss of hydrogen with formation of aryl isocyanates, whereas the loss of carbon monoxide leads to arylamines via arylaminyl radicals; (ii) dimerization to NN′-diaryloxamides; (iii) aromatic substitution on chlorbenzene leading to N-arylbenzamides (ipso-substitution) and N-
for the direct arylation of benzothiazole by employing oxime-derived palladacycle 1 as a catalyst was developed. The new catalyst system can be used for 2-arylations by using aryl bromides and iodides. In addition, this method is especially suitable for the intramolecular direct coupling of bromo- and iodoamides, as well aschloroamides, to achieve a rapid synthesis of benzo[c]phenanthridine alkaloids
Potassium Carbonate Promoted C–N Coupling Reaction between Benzamides and Aryl Iodides
作者:Songlin Zhang、Fei Huang、San Wu、Weiye Hu
DOI:10.1055/s-0036-1591843
日期:2018.3
benzamides promoted by potassium carbonate in the presence of DMEDA was developed. The reaction was carried out without addition of any transition-metal catalyst to afford a variety of N-arylated products in moderate to good yields (up to 97%). A practical and efficient method for N-arylation of benzamides promoted by potassium carbonate in the presence of DMEDA was developed. The reaction was carried out
Substituted 2-phenyl-4-quinolone-3-carboxylic acid compounds and their use as antitumor agents
申请人:Kuo Sheng-Chu
公开号:US20050032832A1
公开(公告)日:2005-02-10
Substituted 2-phenyl-4-quinolone-3-carboxylic acid derivatives and their salts were synthesized. The results of preliminary screening revealed that these compounds are potent in killing solid tumor cancers.