Scheme 2.
aReagents and conditions: (a) i. Phenols 23-26, 29, NaH, DMF, 0 °C, ii. 30 (in DMF), 0 °C; (b) i. K2CO3, MeOH, reflux, ii. HCI/MeOH, ether, r.t., or TFA/DCM (for 35), after isolation.
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.