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.
For description of synthesis of compounds see the Supporting Information. Reagents and conditions: (i) 2-bromoethoxy-tert-butyldimethylsilane, K2CO3, MeCN, 80 °C, 70%; (ii) HCl in dioxane, CH2Cl2, rt, 41%; (iii) SOCl2, CHCl3, 85 °C, 92%; (iv) Cs2CO3, DMF, 100 °C, 40%.
