Cycloaddition of P-C Single Bonds: Stereoselective Formation of Benzo-1,3,6,2-trioxaphosphepine Complexes via a
Payal Malik1, Arturo Espinosa Ferao2, Gregor Schnakenburg3
1Sant Longowal Institute of Engineering & Technology, Longowal, Sangrur, Punjab, 148106, India.
Abstract:
While phosphaalkenes and phosphanes are known to participate in [4+n] cycloaddition reactions, P-C single bonds are inert in this respect. Herein, reactions of oxaphosphirane complexes with tetrachloro-ortho-benzoquinone are presented that reveal a stereoselective reaction of the endocyclic P-C bond to afford benzo-1,3,6,2-trioxaphosphepine complexes. High-level DFT calculations provide evidence that the final product is derived from a sequence of three consecutive steps involving a ditopic van der Waals complex.
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