Regioselective Synthesis of 1-Sulfanyl- and 1-Selanylindolizines
摘要:
We describe herein a new approach to prepare unprecedented bioactive indolizine motifs decorated with organosulfur and organoselenium groups. A total of 12 1-sulfanylindolizines and 2 1-selanylindolizines were prepared in excellent yields by an intramolecular annulation of easily prepared chalcogen-containing pyridinium salts. The reaction is fast (1 h at 70 degrees C or 5 min under sonication) and transition-metal-free, using glycerol as a green solvent.
A one-pot, two-stepsynthesis of pyridine-2-ylmethyl thioethers is developed through a TFAA-mediated [3,3]-sigmatropic rearrangement of pyridine N-oxides and TBAB-catalyzed direct conversion of trifluoroacetates into thioethers under metal- and base-free conditions. This methodology enables thiolation of the unactivated methyl C(sp3)–H bond in 2-picolines with thiols. Remarkable features of the method
2-[(Phenylthio)methyl]pyridine derivatives: new antiinflammatory agents
作者:Fortuna Haviv、Robert W. DeNet、Raymond J. Michaels、James D. Ratajczyk、George W. Carter、Patrick R. Young
DOI:10.1021/jm00356a018
日期:1983.2
2-[(Phenylthio)methyl]pyridine derivatives inhibited the dermal reverse passive Arthus reaction (RPAR) in the rat. In the same model, indomethacin was inactive, and hydrocortisone was active. Compounds Ia-d also significantly reduced exudate volume and white blood cell accumulation in the pleural RPAR. This pattern of activity was similar to that of hydrocortisone and different from that of indomethacin