Abstract
Exoxyalkanephosphonates are compounds of interest as potential drugs1 or intermediates in various synthetic transformations2. Especially 1,2-epoxyalkanephosphonates and 2,3-epoxyalkanephos-phonates attracted much attention and many preparatively useful routes to these compounds have been reported3. On the other hand the synthesis of 3,4-epoxyalkanephosphonates has to our knowledge not been described∗.