1.1: t-BuLi / diethyl ether; hexane / 0.25 h / -78 °C 1.2: diethyl ether; hexane / -78 - 25 °C 2.1: 0.470 g / PCC / CH2Cl2 / 12 h / 25 °C 3.1: 53 percent / NaOAc / PdCl2(PPh3)2 / N,N-dimethyl-acetamide / 0.02 h / Irradiation View Scheme

<b>Multi-step reaction with 3 steps<br /> </b>1: 40 percent / NBS / CCl₄ <br />2: 80 percent / nBuLi; I₂ / hexane / -78 &deg;C<br />3: 95 percent / (COCl)2; DMSO<br /> <br /> &nbsp;