A facile synthesis of symmetric esters of C
1
-C
10
alkylenebisphopsphonic acids is disclosed in which a C
1
-C
10
alkylenebis(phosphonic dichloride) is reacted with an alcohol in the presence of a catalytic amount of 1H-tetrazole and a base in an aprotic solvent to form a first reaction mixture. The first reaction mixture is maintained for a time period sufficient to form a C
1
-C
10
alkylenebis(chloro ester phosphonate) that is reacted under basic conditions with an excess of a hydroxylated compound to form a second reaction mixture that is itself maintained for a time period sufficient to form a C
1
-C
10
alkylenebis(ester phosphonate) partial ester, homoleptic tetraester or mixed tetraester. The material so formed can be recovered or used as is.
本文披露了一种对称的C1-C10烷基
双膦酸酯的简便合成方法,其中C1-C10烷基双(
膦酸二
氯化物)与醇在无极性溶剂中,在
1H-四唑催化剂和碱的存在下反应形成第一反应混合物。第一反应混合物维持一定时间,形成C1-C10烷基双(
氯酯
膦酸酯),在碱性条件下与过量的羟基化合物反应形成第二反应混合物,第二反应混合物维持一定时间,形成C1-C10烷基双(酯
膦酸酯)部分酯、同
配体四酯或混合四酯。所形成的材料可以回收或直接使用。