Scheme 11.
Synthesis of genistin. Reagents and conditions: a) hexanoyl chloride, pyridyne, DMAP, CHCl3, 0oC, 91%; b) PhSH, NMP, Im, 78%; c) BF3.Et2O, CH2Cl2, 4A MS, rt, 6h, 78%; d) K2CO3, MeOH, THF, H2O, 40oC, 5h, 94%.
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