A novel route to C-unsubstituted 1,2-oxaphosphetane and 1,2-oxaphospholane complexes

Abstract

The synthesis of 1,2-oxaphosphetane complexes 7 and 1,2-oxaphospholane complex 12 bearing only substituents at phosphorus is reported using the reaction of Li/Cl phosphinidenoid complex 2 with 2-iodoethanol or 3-bromo-propane-1-ol and the subsequent dehydrohalogenation using KHMDS. In contrast, the reaction of complex 6 with ^tBuLi leads selectively to the formation of phosphinito complex 9.