1: 81 percent / Ca(OCl)2, glacial acetic acid / CH2Cl2; H2O / 0.33 h / 5 °C 2: 68 percent / n-butyllithium, diisopropylamine / hexane; hexamethylphosphoric acid triamide / -78 deg C, 5 min then r.t. 1 h View Scheme