1: aq. K2CO3, NaI / acetone 2: pyrrolidin-2-one hydrotribromide, pyrrolidin-2-one / tetrahydrofuran / Heating 3: dimethylsulfoxide 4: methanol 5: NaBH4 / ethanol 6: H2 / Pd-C / aq. ethanol View Scheme

1: pyrrolidin-2-one hydrotribromide, pyrrolidin-2-one / tetrahydrofuran / Heating 2: dimethylsulfoxide 3: methanol 4: NaBH4 / ethanol 5: H2 / Pd-C / aq. ethanol View Scheme

1: dimethylsulfoxide 2: methanol 3: NaBH4 / ethanol 4: H2 / Pd-C / aq. ethanol View Scheme

1: methanol; H2O / Heating 2: aq. K2CO3, NaI / acetone 3: pyrrolidin-2-one hydrotribromide, pyrrolidin-2-one / tetrahydrofuran / Heating 4: dimethylsulfoxide 5: methanol 6: NaBH4 / ethanol 7: H2 / Pd-C / aq. ethanol View Scheme

1: methanol 2: NaBH4 / ethanol 3: H2 / Pd-C / aq. ethanol View Scheme

1: NaBH4 / ethanol 2: H2 / Pd-C / aq. ethanol View Scheme