1: 93 percent / 30percent H2O2 / acetonitrile / 12 h / 0 °C 2: 1.) LDA / 1.) THF, -78 deg C, 1 h, 2.) a) -78 deg C, 1 h, b) 0 deg C, 3 h View Scheme

(i) LDA, THF, (ii) /BRN= 1730824/; Multistep reaction;