(e) DMP, CH2CI2 РСС, СН2CI2 Pyridinium chlorochromate in Aco OAc -OAc methylene chloride solvent OAc = 1. DMSO, (COCI)2 2. Et,N Dimethylsulfoxide & oxalyl chloride, then triethylamine Dess-Martin Periodinane (DMP) in methylene chloride solvent

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