1: pyridine 2: 1) LiCuCl4; 2) Mg; 3) diisobutylaluminium hydride / 1) abs. THF, -45 deg C; 2) diethyl ether, -45 deg C, 3 h; 3) diethyl ether, toluene, -10 deg C. View Scheme

lithium tetrachlorocuprate; diisobutylaluminium hydride; magnesium 1) abs. THF, -45 deg C; 2) diethyl ether, -45 deg C, 3 h; 3) diethyl ether, toluene, -10 deg C.; Yield given. Multistep reaction. Yields of byproduct given. Title compound not separated from byproducts;