Scheme 2. (i) CF3COOH:H2O:1,4-dioxane, 4:1:1, 87% (ii) TsCl, pyridine, 57% (iii) KOH, 1,4-dioxane; then Dowex, 87% (iv) TsCl, pyridine, 66% (v) NaBH4, MeOH, 66% (vi) H2, Pd/C, 1,4-dioxane: H2O (2:1), 100%.
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.