Citation: S. Warren et al., SYNTHESIS OF ACHIRAL AND HOMOCHIRAL DIBENZO[B,F]PHOSPHEPIN 5-OXIDES USING BROMINE LITHIUM EXCHANGE - X-RAY STRUCTURE OF Y-10,11-DIHYDRO-5-PHENYL-5H-DIBENZO[B,F]PHOSPHEPIN 5-OXIDE/, Tetrahedron letters, 37(31), 1996, pp. 5609-5612