Synthesis of N-[[(substituted-phenyl)carbonyl]amino]-1,2,3,6-tetrahydropyridines with analgesic and hyperglycemic activity
摘要:
A group of N-[(phenylcarbonyl)amino]1-2,3,6-tetrahydropyridines, 5, were synthesized to determine the effect that changes in aromatic substitution on the phenyl ring have on analgesic, hyperglycemic, and antiinflammatory activities. All of the N-[(phenylcarbonyl)amino]-1,2,3,6-tetrahydropyridines 5 exhibited potent analgesic activity, relative to morphine, irrespective of the position and physicochemical properties of the aromatic substituent. Pretreatment with naloxone did not alter the analgesic activity of the 4-fluorophenyl derivative 5P. N-[[(2-Fluorophenyl)-carbonyl]amino]-1,2,3,6-tetrahydropyridine (5n) was one of the most active hyperglycemic agents, elevating blood glucose 213 and 127% at 2 and 4 h after a 100 mg/kg po dose. Incorporation of aromatic substituents into the 3 and 4 positions of 1 abolished antiinflammatory activity.
Rh(
<scp>III</scp>
)‐Catalyzed Diverse C—H Functionalization of Iminopyridinium Ylides
作者:Zhenzhen Dong、Pengfei Li、Xingwei Li、Bingxian Liu
DOI:10.1002/cjoc.202100203
日期:2021.9
Divergent synthesis of useful skeletons has been realized via rhodium(III)-catalyzed C—H activation of iminopyridinium ylides and coupling with various unsaturated coupling reagents. Isocoumarins and isoquinolones were obtained via cleavage of the C—N or N—N bond in the ylidic directing group, while fluorinated alkenes were delivered with the directing group intact. The reactions occurred with wide