Scheme I.
a) Pd(II)acetate, BINAP, K3PO4, dioxane, 100 °C, 17 h; b) 4N HCl in dioxane; c) Pd(II)acetate, BINAP, K3PO4, dioxane, 100 °C, 15 h; d) Methanol, 4N HCl in dioxane
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