A series of 2-aryl-3-phenylamino-4,5-dihydro-2H-benz[g]indazoles was synthesized and tested for antiarrhythmic, localanaesthetic and analgesic activity. The title compounds showed a good antinociceptive activity.
Enantioselective Synthesis of Ring-Fused Spiroannulated 1,2,3-Thiadiazole Derivatives
作者:Xue-Mei Zeng、Jian-Wu Xie
DOI:10.1021/acs.joc.6b00127
日期:2016.5.6
An organocatalytic enantioselective domino α-amination/oxidative coupling/cyclization of thioamides to azodicarboxylates catalyzed by an easily available organic catalyst has been developed. The key step, oxidative coupling, is smoothly fulfilled in air. Optically active spiroannulated 1,2,3-thiadiazole derivatives are obtained with high yields and enantioselectivities for the first time.
Simultaneous diversity-oriented synthesis of benzothiazoles and related diverse analogues by iodine-catalyzed intramolecular cyclization from identical substrates
A facile oxidative cyclization of β-ketothioamides for the simultaneous formation of a compound library similar to natural product benzothiazole derivatives has been developed. The oxidative cyclization of β-ketothioamides resulted in the simultaneous formation of four classes of previously unknown benzothiazole derivatives. This chemistry’s versatility adds a valuable component to the methodology
An N-heterocyclic carbene-catalyzed asymmetric [3 + 3] spiroannulation of beta-ketothioamide was successfully developed. beta-Ketothioamides exhibit an unusual reactivity to undergo a previously challenging lactamization reaction, and the desired spiro-piperidinone derivatives containing two vicinal stereogenic centers were synthesized in good to high yields with high stereoselectivities, whose structure can be converted to the corresponding imide and delta-lactam derivatives smoothly.
Synthesis of functionalized pyridines and thiophenes by Michael addition of some ?-keto carbothioic acid anilides to electrophilic olefins