申请人:Hoechst Aktiengesellschaft
公开号:US03972923A1
公开(公告)日:1976-08-03
Process for preparing phosphonic acid dihalides of the formula ##EQU1## wherein R is alkyl of 1 to 18 carbon atoms, cycloalkyl of 4 to 8 carbon atoms, alkenyl of 2 to 18 carbon atoms, phenyl, phenalkyl or alkyl-phenyl of 7 to 8 carbon atoms, phenyl, phenalkyl or alkyl-phenyl of 7 to 8 carbon atoms, all radicals R optionally being substituted by chlorine, bromine, cyano or lower acyloxy, and wherein X is halogen such as 2-chloroethane phosphonic acid dichloride, by reacting phosphonic or thio-phosphonic acids of the formula ##EQU2## wherein Y is oxygen or sulfur, their salts or functional derivatives, with acid halides of the formula (CO).sub.n X.sub.2 (III) wherein X is chlorine or bromine and n is 1 or 2, in the presence of 0.2 - 5% or in the presence of 0.01 to 0.2% by weight of 1. compounds containing at least one tri- to pentavalent nitrogen or phosphorus atom, which in the case of nitrogen is bound with 1 to 4, in the case of phosphorus with at least 3 valences to organic radicals having up to 20 carbon atoms, two of these valences optionally forming a double bond, or 2. mono-di- or tribasic organic or inorganic fully amidated acids or tri- or pentavalent phosphorus, the N atom of which optionally being substituted by aliphatic radicals having up to 20 carbon atoms, and the organic radicals of which contain up to 20 carbon atoms, If required, in the presence of an inert solvent.
制备式为##EQU1##的膦酸二卤代物的过程,其中R是1至18个碳原子的烷基,4至8个碳原子的环烷基,2至18个碳原子的烯基,苯基,苯基烷基或7至8个碳原子的烷基苯基,苯基,苯基烷基或7至8个碳原子的烷基苯基,所有基团R可选择地被氯,溴,氰基或较低的酰氧基取代,其中X是卤素,例如2-氯乙烷膦酸二氯化物,通过将式为##EQU2##的膦酸或硫膦酸与式为(CO).sub.nX.sub.2(III)的酸卤反应而得,其中Y是氧或硫,它们的盐或功能衍生物,X是氯或溴,n为1或2,在0.2-5%的存在下或在0.01至0.2%的存在下按重量计的1.至少含有一个三至五价氮或磷原子的化合物,其中在氮的情况下与1至4个,在磷的情况下与至少3个价的有机基团结合,这些价中的两个可选择地形成双键,或2.单,二或三碱基的有机或无机全酰胺酸或三价或五价磷,其中N原子可选择地被含有最多20个碳原子的脂肪基团取代,其有机基团含有最多20个碳原子,如有必要,在惰性溶剂的存在下。