1: 4-chloro pyridine hydrochloride in dichloromethane; water 0.25 h; 2: 3,4,5-trimethoxyphenylboronic acid With iron sulphate heptahydrate; dipotassium peroxodisulfate in dichloromethane; water T=20°C; 5 h; 3: With sodium hydroxide in dichloromethane; water T=20°C; Overall yield = 72 percent;

trichlorophosphate T=110°C; 2 h;