Short Formal Syntheses of Lycorine and Congeners Using a 5 -Endo-Trig/6 -Endo-Trig Radical Cyclization Sequence

Org Lett. 2024 May 24;26(20):4292-4296. doi: 10.1021/acs.orglett.4c01271. Epub 2024 May 10.

Abstract

Here, we report a practical route to medicinally interesting lycorine congeners alongside formal syntheses of various lycorine-type natural products, including lycorine itself. The efficiency of our strategy derives from a back-to-back 5-endo-trig/6-endo-trig radical cyclization sequence, which we systematically studied both experimentally and computationally. The results of our work will facilitate future development of urgently needed antiviral therapeutics based on lycorine.