Trifluoromethylated 1,2λ5σ4-oxaphospholanes via λ5σ5P tricyclic phosphoranes from 4,4,4-trifluoro-3-hydroxy-1-phenylbutane-1-one and dichlorophosphines. Molecular structure of a trapped phosphonite

Article abstract of DOI:10.1016/S0022-1139(97)00061-4

Reacting 4,4,4-trifluoro-3-hydroxy-1-phenylbutane-1-one (1) with the dichlorophosphines RPCl₂ (2a, R = Me; 2b, R = Ph) gave the phosphonites 3a and 3b, which, in the case of 3a, was trapped using hexafluoroacetone to furnish the 1,3,2λ⁵