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) oxalyl chloride, DMSO, DCM, then TEA, −78 °C to rt, 2 h; (b) 1c, NaBH(OAc)3, TEA, DMF, rt, overnight; (c) TFA, DCM, rt, 2 h; (d) E3 ligand (2a, 3a, or 4a), HATU, HOAt, DIPEA, DMF, rt, 2 h.
