SYNTHESIS AND HALOGENATION OF 2-CHLORO-1,3-ALKADIENYLPHOSPHONIC ACIDS
摘要:
2-Chloro-1,3-alkadienylphosphonic acids 2 have been synthesized by hydrolysis of the 2-chloro-1,3-alkadienylphosphonic dichlorides 1. The chlorination of 2 takes place with formation of 2-hydroxy-5,6-dihydro-2H- 1,2-oxaphosphorine 2-oxides, but their bromination yields mixtures of 2-hydroxy-5,6-dihydro-2H-1,2-oxaphosphorine a-oxides and phosphorylated 2-chloro-1,2,3-tribromoalkanes.