Pd‐NHC catalysed Carbonylative Suzuki coupling reaction and its application towards the synthesis of biologically active 3‐aroylquinolin‐4 (1<i>H</i>)‐one and acridone scaffolds
作者:Prasanjit Ghosh、Bhaskar Ganguly、Sajal Das
DOI:10.1002/aoc.4173
日期:2018.3
We have unfolded a convenient and mild protocol for the synthesis of diaryl ketones via Pd‐ NHC catalysed carbonylative Suzuki coupling reaction. Notably, this method offers advantages like no use of toxic CO gas, shorter reaction time, high yield, and broad substrate scope. Several sensitive functional groups (like‐COMe, ‐COOMe, ‐F, ‐Cl, ‐Br, ‐NH2, ‐CN) are well tolerated in this reaction. In addition
A [4 + 2] annulation involving cascade Knoevenagel, aza-Wittig and dehydrofluorination reactions is developed for the synthesis of substituted quinolin-4-ols including analogs bearing CF2H, CF3, and C2F5 groups. This simple and highly efficient method is also applicable for the synthesis of substituted quinolines. A number of reported biologically active compounds can be readily prepared by this one-pot
开发了一种包括级联Knoevenagel,aza-Wittig和脱氟化氢反应的[4 + 2]环合反应,用于合成取代的喹啉-4-醇,包括带有CF 2 H,CF 3和C 2 F 5基团的类似物。这种简单而高效的方法也适用于取代喹啉的合成。通过一锅法合成可以容易地制备许多报道的生物活性化合物。新反应过程的绿色化学指标分析提供了令人满意的结果。
Regioselective Condensation of Alkylidenephosphoranes with Bifunctionalized Compounds: New Approach to the Synthesis of Fused<i>O</i>- and<i>N</i>-Heterocycles
作者:Wafaa M. Abdou、Neven A. F. Ganoub、Amin F. M. Fahmy、Abeer A. M. Shaddy
DOI:10.1080/104265090921092
日期:2005.10
A series of fused pyran- (similar to 40% yield) and furan- (similar to 20% yield) derivatives were regioselectively prepared from the reactions of 5,6-difur-2'y1-3-oxo-2,3-dihydropyridazin-4-carbonitrile with ester- and keto phosphorus ylides, whereas new ylides were obtained, in addition to fused furans, in almost equal yields (33%) from the reaction of the same substrate with cyanomethylene(triphenyl)phosphorane. However application of such Wittig reagents on 2[(benzylidene)amino]-benzonitrile afforded, in all cases, 4-hydroxyquinalines in a similar to 42% yield as major products. Moreover; 2-[(triphenylphosphoranylidene)amino] benzonitrile, with the corresponding alkene, was also isolated a side products.
Sinsky, M. S.; Bass, R. G., Journal of Heterocyclic Chemistry, 1984, vol. 21, p. 759 - 768
作者:Sinsky, M. S.、Bass, R. G.
DOI:——
日期:——
SINSKY, M. S.;BASS, R. G., J. HETEROCYCL. CHEM., 1984, 21, N 3, 759-768