1: LiAlH4 / tetrahydrofuran / 1.5 h / Heating 2: Na2CO3 / ethanol / 12 h / 150 °C View Scheme

1: 94 percent / 1,1-bis(3aS,8aR-dihydroindeno[1,2-d]oxazol-2-yl)cyclopropane; Mg(OTf)2*4H2O; N-methylmorpholine / 4A molecular sieves / CHCl3 / 20 °C 2: H2; H2PO4 / Raney-Ni / tetrahydrofuran / 50 - 60 °C / 2068.65 Torr 3: aq. NaOH / ethanol; tetrahydrofuran 4: TsOH / isopropyl acetate / Heating View Scheme

1.1: n-BuLi / tetrahydrofuran / 0.5 h / -78 °C 1.2: ZnCl2 / tetrahydrofuran / 0.75 h / -78 - 0 °C 1.3: 80 percent / tetrahydrofuran / -78 - 20 °C 2.1: 72 percent / aq. H2SO4 3.1: 80 percent / NaBH4; NiCl2 / ethanol View Scheme

1.1: LDA / tetrahydrofuran / -78 °C 1.2: 75 percent / tetrahydrofuran 2.1: 88 percent / H2 / Raney Nickel / ethanol; ethyl acetate View Scheme