Scheme 6.
Synthesis of spirolactone-type 6,7-seco-ent-kauranoid derivatives (94–97). Reagents and conditions: (a) 10% HCl, THF (v/v, 1:1), rt; (b) Pb(OAc)4, K2CO3, THF, 0 °C; and (c) EDCI, DMAP, DCM, rt.
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.