Synthesis of water soluble pentacyclic dihydroxyterpene carboxylic acid derivatives coupled amino acids and their inhibition activities on α-glucosidase
摘要:
Twenty maslinic acid and corosolic acid derivatives were obtained by coupling with L-amino acids at C-28 position. The alpha-glucosidase inhibitory activities of the present compounds were evaluated in vitro. Results reveal that some of the derivatives exhibit a better a-glucosidase inhibitory activity than that of acarbose in the test conditions of ethanol-water solution and DMSO. It is worth noting that maslinic acid and corosolic acid derivatives coupled aspartic acid (9f: IC50 = 382 mu m and 10f: IC50 = 364 mu m, respectively) have the best water solubility and thus presented higher inhibitory activity than that of acarbose (IC50 = 484 mu m). Unfortunately, all of the derivatives possess lower inhibitory properties of a-glucosidase than those of the parent compounds in the measurement system of DMSO solution, even if the derivatives exhibit better water solubility than that of the parent compounds.
Solution- and solid-phase synthesis and anti-HIV activity of maslinic acid derivatives containing amino acids and peptides
作者:Andres Parra、Francisco Rivas、Pilar E. Lopez、Andres Garcia-Granados、Antonio Martinez、Fernando Albericio、Nieves Marquez、Eduardo Muñoz
DOI:10.1016/j.bmc.2008.12.041
日期:2009.2
Maslinic acid (1) has been coupled at C-28 with several α- and ω-amino acids by using solution- and solid-phase synthetic procedures. Twelve derivatives (2–13) with a single aminoacid residue were prepared in solution phase, whereas a dipeptide (14), a tripeptide (15), and a series of conjugate dipeptides (16–24) were synthesized in solid phase. The anti-HIV activity of these compounds was assessed