Functional monomers and polymers, 103. Synthetic application of polystyrene‐bound chloropyrimidine and chloropurine as dehydrating and desulfhydrating reagents

Poly{1‐[4‐(4‐chloro‐2‐oxo‐1,2‐dihydropyrimidin‐1‐ylmethyl)phenyl]‐ethylene} (1b) was pre‐pared by condensation of chloromethylated polystyrene and uracil and subsequent reaction with POCl3, and used as dehydrating and desulfhydrating reagent for the preparation of hydro‐xamates, acid chlorides, nitriles, and lactones. Other types of polymeric reagents, poly{1‐[4‐(2,6‐dichloro‐4‐pyrimidinylaminomethyl)phenyl]ethylene} (4) and poly{1‐[4‐(6‐chloro‐9(7)‐puri‐nylmethyl)phenyl]ethylene} (5) were prepared analogously. It was found that 1 b shows the highest activity in these syntheses as compared with the other polymeric reagents 4 and 5.