in dichloromethane 19 h; Heating;

2: H2O / reflux, dioxane, 12 h 3: NaBH4 / aq. ethanol 4: 70 percent / CH2Cl2 / 19 h / Heating View Scheme

1: H2O / reflux, dioxane, 12 h 2: NaBH4 / aq. ethanol 3: 70 percent / CH2Cl2 / 19 h / Heating View Scheme

2,2'-azo-bisisobutyronitrile; triphenylstannane; acetic acid 1.) reflux, benzene, 20 h, 2.) 1 h; Yield given. Multistep reaction. Yields of byproduct given. Title compound not separated from byproducts;