Figure 3.
Synthetic scheme for the preparation of 8-bromo-7H-furo[3′,4′:4,5]benzo[1,2-d][1,3]dioxol-5-one (19). Reagents: (a) CuCN/HCONH2/H2O; (b)HNO3/H2SO4; (c) H2/Pd; (d) bis(N-methylpyrrolidinone) HBr3 and (e) NaNO2/H+; (f) H3PO2.
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