A 3-step, regio- and stereo-selective, high-yielding synthesis of t-2-[(diphenylphosphinoyl)methyl]-c-3-(disubstitutedphosphinoyl)-r-1-cyclopentanols (8a–d) is described. Reaction of epoxides 2a–d and/or 5a–d with the lithium derivative of methyldiphenylphosphine oxide (9) gave cyclopentanols 8a–d. Base-catalyzed rearrangement of epoxides 2a–d and/or 5a–d led to 3-(disubstitutedphosphinoyl)cyclopent-2-en-1-ols