1: 85 percent / PPh3, CCl4, K2CO3 / CH2Cl2 / 8 h / Heating 2: 1,4-dicyanonaphthalene, K2CO3 / propan-2-ol / 3 h / Ambient temperature; Irradiation 3: 1.) O3, 2.) Me2S / 1.) MeOH, CH2Cl2, -78 deg C, 2.) r.t., 1 h 4: NaBH4 / ethanol / 3 h / Heating View Scheme