To a flask containing 100 ml (0.85 mole) of distilled quinoline is added with stirring 41 gm (0.214 mole) of /7-toluenesulfonyl chloride (see Note), and the solution is warmed to 75°C. Then 18.4 gm (0.212 mole) of isopropylformamide is added and the pressure of the system is reduced to 70 mm Hg. The isopropylisonitrile as it forms distills into a liquid nitrogencooled receiver. (Dry ice is not as effective but may be used.) The product is redistilled to afford 4.2 gm (30%), b.p. 88-89°C (735 mm Hg).
