摘要:
Peucedanin reacted with methylideneiminium salt generated in situ from N,N,N',N'-tetramethylmethanediamine and acetyl chloride to give 2-(dimethylaminomethyl)oreoselone. Reactions of peucedanin with aminomethylating agents generated in situ from formaldehyde and dimethylamine, N-methylpiperazine, or N-Boc-piperazine in boiling methanol smoothly afforded the corresponding 9-aminomethyl derivatives whose hydrolysis produced 9-aminomethyl-substituted oreoselones. 2,3,9-Trisubstituted linearly fused furocoumarins were synthesized by reactions of 9-substituted oreoselone trifluoromethanesulfonates with arylboronic acids.