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) benzaldehyde (4-chlorobenzaldehyde or 4-fluorobenzal dehyde), Et3N, NaBH4, anhydrous CH3OH, 85%; (b) (Boc)2O, Et3N, CH3OH, 65%; (c) NH2OK, anhydrous CH3OH, 30–40%; (d) AcOEt/HCl, 70%.
