1: (iso-Pr)2EtN / CH2Cl2 / 3 h / Ambient temperature 2: aq. K2CO3 / methanol / 3 h / Ambient temperature View Scheme

1: 50 percent / diisopropyl ether; H2O / 2 h / Ambient temperature; lipase AY from Candida rugosa 2: (iso-Pr)2EtN / CH2Cl2 / 3 h / Ambient temperature 3: aq. K2CO3 / methanol / 3 h / Ambient temperature View Scheme

sodium dichromate; sulfuric acid T=93°C; 0.75 h; Yield given;

1: 1.) NaH / 1.) DMF, 0 deg C, 1 h, 2.) DMF, RT, 1 h 2: 50 percent / diisopropyl ether; H2O / 2 h / Ambient temperature; lipase AY from Candida rugosa 3: (iso-Pr)2EtN / CH2Cl2 / 3 h / Ambient temperature 4: aq. K2CO3 / methanol / 3 h / Ambient temperature View Scheme

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