A novel strategy for site-specific fluorescent labeling on naringenin (1) was established by a new direct Mannich reaction in combination with a Huisgen [3+2]-cycloaddition reaction. High regioselectivity was observed for direct Mannich reactions on naringenin and several other flavonones using a variety of amines and aldehydes.
Synthesis of novel flavonoid alkaloids as α-glucosidase inhibitors
作者:Jing Zhen、Yujie Dai、Tom Villani、Daniel Giurleo、James E. Simon、Qingli Wu
DOI:10.1016/j.bmc.2017.07.055
日期:2017.10
A series of novelflavonoid alkaloids were synthesized with different flavonoids and attached nitrogen-containing moieties. These new compounds were screened for inhibitory activity of α-glucosidase, among which compound 23 was found to show the lowest IC50 of 4.13 μM. Kinetic analysis indicates that the synthesized compounds 15 and 23 inhibit the enzyme in a non-competitive model with Ki value of