KAPA Yield given;

n-butyllithium; water Yield given. Multistep reaction;

1: KAPA 2: 94.1 percent / PPTS / CH2Cl2 / 15 h / Ambient temperature 3: 90 percent / 1.) Cp2Zr(Cl)h, 2.) I2 / benzene / 1.) 20-25 deg C, 7 h 4: 94 percent / PPTS / ethanol / 4 h / 55 °C View Scheme