The first asymmetric totalsynthesis of the natural pyrrolelactonelonganlactone has been achieved. The key reactions, a Barbier propargylation and a Paal–Knorr pyrrolesynthesis, have provided easy access to the target natural product from L-aspartic acid in six steps and 31 % overall yield. The C-4 epimer of the natural product and propionyllonganlactone have also been prepared by this strategy
Synthesis and biological evaluation of longanlactone analogues as neurotrophic agents
作者:Chada Raji Reddy、Amol Gorgile Tukaram、Siddique Z. Mohammed、Uredi Dilipkumar、Bathini Nagendra Babu、Sumana Chakravarty、Dwaipayan Bhattacharya、Pranav C. Joshi、René Grée
DOI:10.1016/j.bmcl.2018.01.020
日期:2018.2
Longanlactone analogues were synthesized using a route featuring Friedel-Crafts acylation, Sonogashira coupling and 1,3-dipolar cycloaddition reactions. Structure–activity relationships were investigated for neurotrophic activity. Compound 6 was found to have the most potent neurotrophic activity among all the synthesized analogues in Neuro2a cells as evidenced by a battery of in vitro/cell based assays