申请人:Societe Nationale des Poudres et Explosifs
公开号:US05202454A1
公开(公告)日:1993-04-13
The invention relates to a new process for the preparation of 1-bromoalkyl hydrocarbyl carbonates. The carbonates according to the invention are prepared by reacting an alpha-chlorinated carbonate of formula ##STR1## with an anhydrous brominated compound of formula ZBr in which Z represents hydrogen, the group (CH.sub.3).sub.3 -Si-, the group ##STR2## or bromine if R.sub.2 is other than an aromatic radical, in the presence of a catalyst chosen from the group consisting of heteroaromatic amines, quaternary ammonium or phosphonium halides, hexasubstituted guanidinium halides, alkaline earth metal halides or alkali metal halides in combination with a complexing agent for their cation. The carbonates according to the invention find their preferential applications as blocking agents for some antibiotics or as agents for the synthesis of phosphorus-containing carbonates which can be used as insecticides.
该发明涉及一种制备1-溴烷基羟基碳酸酯的新工艺。根据该发明,通过将式##STR1##的α-氯化碳酸酯与式ZBr中Z代表氢、基(CH3)3-Si-、基##STR2##或溴(如果R2不是芳香基)的无水溴化合物在选择自杂芳胺、季铵或磷铵卤化物、六取代胍卤化物、碱土金属卤化物或碱金属卤化物的催化剂存在下反应制备碳酸酯。根据该发明的碳酸酯在一些抗生素的阻断剂或磷含碳酸酯的合成剂方面具有优先应用。