Scheme 2.
Synthesis of intermediate 9. BSA = N,O-bis(trimethylsilyl)acetamide; 1,2-DCE = 1,2-dichloroethane; ABz = 6-N-benzoyl-adenin-9-yl; GNO3 = guanidinium nitrate; 15-C-5: 15-crown-5.
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.