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.
Conventional (from the left) and decarboxylative (from the right) Pd-catalyzed Sonogashira coupling reactions for the preparation of 4-(3-aminophenyl)-2-methyl-3-butin-2-ol (2a), which is used as an intermediate for the synthesis of Erlotinib hydrochloride (3).
