Abstract
The divergent synthesis of benzo[e]-1,2-oxaphosphinines or benzo[d]-1,2-oxaphospholenes along with spirocyclic quasiphosphonium compounds based on 2-alkenylphenols and phosphorus(III/V) chlorides is presented. The reaction is condition-dependent and determined by the biphility of the phosphorus(III) derivative and the dual reactivity of 2-alkenylphenol. The procedures are applicable for obtaining benzo[e]-1,2-oxaphosphinines substituted at position 4 and disubstituted at positions 4 and 5 as well as 3,3-disubstituted benzo[d]-1,2-oxaphospholenes with good to high yields.
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