Figure 9.
Reagents and conditions: (a) NaHSO3, KCN, CH2Cl2; (b) HCl, MeOH; (c) Dess-Martin periodinate, CH2Cl2; (d) Et2NSF3, CH2Cl2; (e) i) (CH3)3SiCF3, CsF, CH3OCH2CH2OCH3, ii) conc. HCl.
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