ChemInform Abstract Phosphorus trichloride (I) reacts with the carbonyl compounds (II) in the presence of nucleophilic reagents (H2O, AcOH, H3PO3) to give the title compounds (III). (X-ray analysis of (IIIa): monoclinic, space group P21/c, Z=4; IR, 31P NMR, 35Cl-NQR data, mechanism).
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