1: NaOH / aq. methanol / Saponification 2: NaCl / dimethylsulfoxide / 130 °C View Scheme

<b>Multi-step reaction with 2 steps<br /> </b>1: 97 percent / Me₃N*HCl; Et₃N / toluene<br />2: 91 percent / CsF / dimethylformamide<br /> <br /> &nbsp;