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) Pd/C, H2, THF, rt; (b) 3, Et3N, THF, 50°C, 85% (2 steps); (c) TBSOTf, 2,6-lutidine, CH2Cl2, rt, 90%; (d) HF·py, THF-pyridine, rt, 87% (e) 7, BF3·OEt2, 4Å molecular sieves, THF-Et2O, -20°C, 43%; (f) TBAF, THF, rt, 97%; (g) Pd(OH)2/C, H2, EtOH-CHCl3, rt, 88%.
