Scheme 9a.
aReagents: (a) Benzoic acid, DIAD, PPh3, THF, 0 °C → room temperature; (b) K2CO3, EtOH, H2O, 100 °C; (c) Pd (10 wt% on carbon), H2, MeOH, room temperature; (d) Formaldehyde, 9-DAA, 1,4-dioxane, H2O, room temperature.
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.