Synthesis of dialkyl [2-0 carbamoyl-3,4,5,6-tetrachlorophenyl] phosphates and dialkyl [4-0-carbamoyl-2,3, 5,5,6, tetrachlorophenyl] phosphates as new biocides

ABSTRACT

ORGANOPHOSPHATES have attracted much interest by virtue of the wide potentialities they possess. Thus they find application as insecticides[1] fungicides[2] and as herbicides [3]. Meanwhile, carbamates are well known for their broad biological activity[4-9]. This prompted us to prepare a number of new compounds, derived from tetrachlorobenzoquinones, encorporating both the phosphoric-, and carbamic acid-ester moieties to examine their biological activity. The phosphate adducts IIIa-c and IVa-c were prepared according to established procedures[10-11] by reacting dialkyl phosphites with tetrachloro-o-benzoquinone [I] and tetrachloro-p-benzoquinone [II] respectively, in the presence of triethylamine