| 摘要 |
<p>1449394 Phosphite mono esters and their salts PEPRO SOC POUR LE DEVELOPPEMENT ET LA VENTE DE SPECIALITES CHIMIQUES 12 Dec 1974 [14 Dec 1973 23 Oct 1974] 53752/74 Heading C2P [Also in Division A5] Phosphite mono-esters and their salts of the general Formula I in which R is a linear or branched chain alkyl radical containing from 1-18C atoms which is unsubstituted or substituted by halogen or nitro; an alkenyl, alkinyl, alkoxy alkyl, or alkenoxy alkyl radical, each of which is unsubstituted or substituted by halogen and the hydrocarbon portion of each radical contains from 1-8 C atoms; a cyclohexyl radical; an optionally substituted aryl radical, or aryl alkyl radical; or a heterocyclic radical optionally attached to the oxygen atom through an aliphatic chain, preferably tetrahydro urfuryl, M represents a hydrogen atom, an ammonium cation, ammonium substituted by from 1-4 alkyl or hydroxy alkyl radicals containing from 1-5 C atoms or by 1 or 2 cyclohexyl radicals or a phenyl radical, or a cation of a metal comprising an alkali metal, an alkaline earth metal, or a polyvalent metal, n is an integer equal to the valency of M are prepared, e.g. by (i) transesterifying a dialkyl phosphonate with phosphorous acid in accordance with the equation: (ii) hydrolysing a phosphorous acid dichloride with water in accordance with the equation or (iii) hydrolysing or saponifying an 0,0-dialkylphosphonate in accordance with the equation Several specific compounds which have been prepared are mentioned such compounds including sodium o-methyl phosphonate, sodium o-n-hexadecyl phosphonate, ammonium o-ethyl phosphonate, o-methyl phosphonate, o-cyclohexyl phosphonate, diethyl ammonium o, ethyl phosphonate, tetramethyl ammonium o-methyl phosphonate, calcium o-ethyl phosphonate, and iron o-ethyl phosphonate. The products have fungicidal properties.</p> |
