1: in methanol; water T=25 - 30°C; 0.25 h; 2: With sodium hydroxide in methanol; water T=25 - 30°C; 3: With hydrogenchloride in methanol; water pH=< 2; 1 h;
Perrey, David A.; Scannell, Michael P.; Narla, Rama Krishna; Uckun, Fatih M.
Bioorganic and Medicinal Chemistry Letters, 2000 , vol. 10, # 6 p. 551 - 552