Synthesis and biological evaluation of some new β-lactam-triazole hybrids
作者:Aliasghar Jarrahpour、Pouria Shirvani、Véronique Sinou、Christine Latour、Jean M. Brunel
DOI:10.1007/s00044-015-1474-x
日期:2016.1
A series of novel b-lactams was synthesized from different imines and a special ketene derived from N-endo-5-norbornene-2,3-dicarboxyloylglycine 1 via the [2 + 2] ketene imine cycloaddition. Then, beta-lactams 3a-h were treated with 1-azido-4-nitrobenzene 4 to afford beta-lactam-triazole hybrids 5a-h. Of the twenty-three beta-lactams tested against chloroquine-resistant P. falciparum K14 strain, 3a and 3d showed IC50 < 20 mu M, while 3j, 3m, 5a-5f exhibited IC50 < 50. These newly synthesized beta-lactams were also tested against S. aureus, E. coli, P. aeruginosa, C. albicans and C. glabrata and showed no activity below 125 mu g/mL.
Synthesis and antihyperglycemic evaluation of various protoberberine derivatives
作者:Xiaoli Bian、Langchong He、Guangde Yang
DOI:10.1016/j.bmcl.2005.11.045
日期:2006.3
Various berberine derivatives (2-17) were synthesized and their antihyperglycemic activities were evaluated in a model of beta-cell-membrane chromatography and a model of alloxan-induced diabetes mice. The results indicated that compounds 5 and 14 exhibited antihyperglycemic activity. Their structure-activity relationships were discussed. (C) 2005 Elsevier Ltd. All rights reserved.
A new and convenient synthesis of protoberberine alkaloids: (±)-tetrahydropalmatine, (±)-sinactine, (±)-canadine, and (+)-stylopine