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.
Reagents and conditions: (a)721 (1) phenylmagnesium bromide, THF, (2) H3O+; (b) (1) pyrrole, BF3·OEt2, CHCl3, N2, reflux, 48 h, (2) triethylamine; (c) (1) BF3·OEt2, CHCl3, (2) DDQ, 15 min; (d) Zn(Hg), toluene, N2; (e) O2; (f) PCl3, TEA, toluene, reflux, 80 min.
