Page 1. SYNTHETIC COMMUNICATIONS, 20(8), 1223-1232 (1990) ... Recrystallization from hexane gave the sample of mp 68-69 "C (lit.' 66-67 "C). Norcotarnine (3) from 8. A solution of 8 (1.21 g. 5 mmol) in EtOH (20 mL) containing excess NH3 was heated at 110 "C in a sealed ...