Scheme 3.
Reagents and conditions: (a) N-ethyl mesitylenesulfonamide, NaH, DMF; (b) N2H4-H2O; (c) mesitylenesulfonyl chloride, Et3N, CH2Cl2; (d) 4-bromobutylphthalimide, NaH, DMF
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.