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    STUDIA CHEMIA - Ediţia nr.2 din 2003  
         
  Articol:   SYNTHESIS AND REACTIVITY OF DIFLUOROMETHYLENE BRIDGED DIPHOSPHA-DERIVATIVES.

Autori:  ROBERT TOTOS, IOAN SILAGHI-DUMITRESCU.
 
       
         
  Rezumat:  The chemistry of organophosphorus compounds has been developing very rapidly in the last four decades. This is primarily due to the considerable theoretical and especially practical importance of these compounds. The application of organophosphorus compounds as insecticides in agriculture, medicine, extractants, flotation agents in mining, plasticisers and stabilizers for polymers, antioxidants for lubricating oils, and the manufacture of non-combustible fabrics and materials are well known.1,2,3 Some α-fluorinated alkanephosphonic acids such as difluoromethane-diphosphonic acid4,5,6 have already been the subjects of interest as analogues of biological phosphonyl species. There is generally a conspicuous lack of methods for the preparation of other difluoromethanephosphonates. Such compounds have been postulated to possess biologically superior properties to those of analogous nonhalogenated phosphonates. However, there are generally few synthetic methods available, which lead to other difluoromethane-phosphonates.7  
         
     
         
         
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