1: 40 percent / NEt3 / CH2Cl2 / 1= 0 deg C, 1h, 2) RT, 16h 2: 76 percent / NaBr / acetone / 16 h / Heating View Scheme

<b>Multi-step reaction with 2 steps<br /> </b>1: 92 percent / diethyl ether / 1) 16h, RT, 2) 1h, reflux<br />2: 1) NaBH₄, BF₃*OEt₂, 2) 3N NaOH, 30percent H₂O₂ / 1) THF, 0 deg C, 1.5h, 2) RT, 2h<br /> <br /> &nbsp;