1: pseudopelletierine hydrochloride With N-ethyl-N,N-diisopropylamine in 1,2-dichloro-ethane T=0°C; 1 h; 2: With 1-chloroethyl chlorocarbonate in 1,2-dichloro-ethane T=80°C; 8 h; 3: di-tert-butyl dicarbonate With methanol; potassium carbonate more than 3 stages;

triethylamine in diethyl ether 0.25 h;