1: 1.) 3-chloroperbenzoic acid, 2.) 10-camphorsulfonic acid / 1.) benzene, RT, 2 h, 2.) benzene, RT, 15 min 2: 97 percent / H2, Na2HPOP4 / 5percent Pd/C / methanol / 2 h 3: 85 percent / zinc triflate / CH2Cl2 / 16 h / Heating 4: 78 percent / H2 / W-2 Raney Ni / ethanol / 36 h / Heating View Scheme

With  (1S)-10-camphorsulfonic acid; 3-chloro-benzenecarboperoxoic acid  1.) benzene, RT, 2 h, 2.) benzene, RT, 15 min;  Yield given. Multistep reaction;   

Multi-step reaction with 2 steps 1: 1.) 3-chloroperbenzoic acid, 2.) 10-camphorsulfonic acid / 1.) benzene, RT, 2 h, 2.) benzene, RT, 15 min2: 97 percent / H2, Na2HPOP4 / 5percent Pd/C / methanol / 2 h  

Multi-step reaction with 3 steps 1: 1.) 3-chloroperbenzoic acid, 2.) 10-camphorsulfonic acid / 1.) benzene, RT, 2 h, 2.) benzene, RT, 15 min2: 97 percent / H2, Na2HPOP4 / 5percent Pd/C / methanol / 2 h3: 85 percent / zinc triflate / CH2Cl2 / 16 h / Heating