Benzo[c]-2-(2-chloro-1,3-alkadienyl)-2-oxo-1,3,2-dioxaphospholanes 2 have been prepared by reaction of the 2-chloro-1,3-alkadienylphosphonic dichlorides 1 with catechol in the presence of triethylamine. The chlorination of 2 takes place with formation of benzo[c]-1,3,2-dioxaphospholane-2-spiro-2′-(4′,5′-dichloro-5′,6′-dihydro-2H-1′,2′-oxaphosphorinium) chlorides.
Benzo[c]-2-(2-chloro-1,3-alkadienyl)-2-oxo-1,3,2-dioxaphospholanes 2 已通过 2-chloro-1,3-alkadienylphosphonic dichlorides 1 与
儿茶酚在
三乙胺存在下。2 的
氯化反应生成 benzo[c]-1,3,2-dioxaphospholane-2-spiro-2'-(4',5'-dichloro-5',6'-dihydro-2H-1' ,2'-氧杂
磷鎓)
氯化物。