THE STEREOCHEMISTRY OF THE DICHLOROCYCLOPROPANATION REACTION OF 2,5-DIHYDRO-LH-PHOSPHOLE1-OXIDES

Abstract The structure of the products from the dichlorocyclopropanation reaction of a number of P-C- and P-O-substituted dihydrophosphole oxides is substantiated and characterized by X-ray analysis and NMR spectroscopy. An explanation is given for the outcome of the reactions yielding the trans-isomer solely or both of the two possible diastereoisomers. The reactivity of the latter two species is briefly discussed.