“…Formation of 3,4-Dihydroisoquinolines. A mixture of chloride 1 , 2 , 3 , or 4 and MeCN or PhCN (2.1 mmol each) was placed in a flask fit with a rubber septum and a condenser, and SnCl 4 (2 mmol) was added through a syringe to the stirred mixture. After the exothermic reaction subsided, the mixture was heated in an oil bath at 110−130 °C for 3 h. It was cooled, basified with 20% NaOH, and extracted with ether.…”