2-Hydroxyethane-phosphonic acid diesters, 2-hydroxyethylphoshinic acid esters and the corresponding thiophoshonic acid-O,O-diesters or thiophosphinic acid-O-esters of the formula ##EQU1## wherein R.sub.1 is alkyl having from 1 to 18 carbon atoms, R.sub.2 has the meaning of R.sub.1 or represents cycloalkyl having up to 10 carbon atoms, alkenyl having up to 18 carbon atoms, aryl having up to 14 carbon atoms or aralkyl having up to 15 carbon atoms, R.sub.3 means hydrogen, alkyl having up to 18 carbon atoms, alkenyl having up to 18 carbon atoms, cycloalkyl having up to 10 carbon atoms, aryl having up to 14 carbon atoms or aralkyl having up to 15 carbon atoms, the substituents R.sub.1 -R.sub.3 optionally being substituted, X represents oxygen or sulfur and n represents either 0 or 1, are prepared from 2-acyloxyethane-phosphonic acid diesters, 2-acyloxy-ethyl-phoshinic acid esters or the corresponding thiophoshonic acid-O,O-diesters or thiophoshinic acid-O-esters and are important intermediate products for the preparation of plant protecting agents and flame-proofing agents.
2-羟基
乙烷膦酸二酯、2-羟基
乙基膦酸酯以及相应的噻
膦酸-O,O-二酯或噻
膦酸-O-酯的
化学式如下:
其中R.sub.1为具有1至18个碳原子的烷基,R.sub.2具有与R.sub.1相同含义或代表具有最多10个碳原子的环烷基,最多18个碳原子的烯基,最多14个碳原子的芳基或最多15个碳原子的芳基烷基,R.sub.3表示氢,最多18个碳原子的烷基,最多18个碳原子的烯基,最多10个碳原子的环烷基,最多14个碳原子的芳基或最多15个碳原子的芳基烷基,取代基R.sub.1-R.sub.3可选择性地被取代,X代表氧或
硫,n代表0或1。这些化合物是从2-酰氧基
乙烷膦酸二酯、2-酰氧基
乙基膦酸酯或相应的噻
膦酸-O,O-二酯或噻
膦酸-O-酯制备而成的,是制备植物保护剂和防火剂的重要中间体。