Scheme 2.
i) a) NaN3, CF3COOH, b) H2O, Δ (77%); ii) LiAlH4, dry THF, Δ (80%); iii) 11b, K2CO3, toluene, Δ (71%); iv) 12, MgSO4, CHCl3 (96%); v) 13, MgSO4, CHCl3 (22%); vi) 14, MgSO4, CHCl3 (81%).
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