| 摘要 |
1418321 Magnesium halide complexes with pentavalent organophosphorus compounds BRIDGESTONE TIRE KK 13 April 1973 [14 April 1972] 18021/73 Heading C2P [Also in Division C3] The invention comprises complexes of the Formula I where X is halogen, n is 1 to 4 and R 1 , R 2 and R 3 are aliphatic or aromatic hydrocarbyl having up to 20 carbon atoms or di-(C 1-20 aliphatic hydrocarbyl)amino. The complexes may be prepared by reacting a magnesium halide with a suitable pentavalent organic phosphorus compound. In a comparative example a hexamethyl phosphoric triamide complex of lithium chloride is prepared in a similar manner. The complexes of Formula I may be used as catalysts in the preparation of oxazolidones. |
