A convenient and inexpensive general preparation method for 1-arylethylphosphonic acids and their esters was developed involving in reduction of the corresponding 1-ethenylphosphonates by ammonium formate in the presence of palladium on carbon. A homogeneous enantioselective hydrogenation of 1-arylethenylphosphonic acids in the presence of chiral ruthenium catalysts provided optically active 1-arylethylphosphonic acids of enantiomeric purity up to 86%. The preliminary data on biological activity testing of the 1-arylethylphosphoic acids synthesized evidence that some among the compounds obtained are low-toxic substances with the properties of immunosuppressors of the central type of action.
作者:N. S. Gulyukina、A. V. Varakuta、I. P. Beletskaya
DOI:10.1007/s11172-007-0290-y
日期:2007.9
A simple method for the synthesis of 1-arylcyclopropylphosphonates was proposed. The method involves treatment of 1-arylethenylphosphonic acids or their esters with diazomethane followed by thermolysis of intermediate 3-aryl-4,5-dihydro-3H-pyrazol-3-ylphosphonates.