methanol; samarium diiodide in tetrahydrofuran; N,N,N',N',N'',N''-hexamethylphosphoric triamide Reflux;

1: 2-methyl-3-(4-methylbenzoyloxy)-2-((4-(trifluoromethyl)benzoyloxy)methyl)propyl 3,5-bis(trifluoromethyl)benzoate With N,N,N',N',N'',N''-hexamethylphosphoric triamide; samarium diiodide in tetrahydrofuran RefluxInert atmosphere; 2: acetic anhydride With 4-(N,N-dimethlyamino)pyridine; triethylamine