Skip to main content
. Author manuscript; available in PMC: 2011 Jun 26.
Published in final edited form as: Tetrahedron. 2010 Jun 26;66(26):4745–4759. doi: 10.1016/j.tet.2010.03.093

Scheme 24a.

Scheme 24a

aConditions: (a) 2,4,6-Cl3C6H2COCl, Et3N, rt, 1 h, 90, toluene, rt, 3 h, 87%; (b) HF• Et3N (40:60 ratio), DMSO, 60 °C, 15 h, 89%.