The present invention relates to a process for preparation of a phosphoromonochloridite in high yield by contacting phosphorus trichloride (PCl
3
) with an aromatic diol in a solution of one or more organic solvents under reaction conditions sufficient to produce the phosphoromonochloridite. The reaction is carried out by adding a feed solution containing the aromatic diol dissolved in a first organic solvent into a reaction zone containing PCl
3
, and optionally one or more second organic solvents, the addition being conducted so as to maintain substantially isothermal process conditions. The reaction solution comprises greater than 0.01 to less than 5 mole percent of a nitrogen base.
本发明涉及一种制备高收率的
磷酸单
氯酯的方法,该方法通过将
三氯化磷(
PCl3)与芳香二醇在一个或多个有机溶剂的溶液中接触,在足够的反应条件下产生
磷酸单
氯酯。该反应是通过将含有芳香二醇在第一种有机溶剂中溶解的进料溶液加入含有
PCl3和可选的一个或多个第二种有机溶剂的反应区域中进行的,加入过程应该保持基本等温的反应条件。反应溶液包含大于0.01至少于5摩尔百分比的
氮碱基。