in N,N-dimethyl-formamide P compd. added dropwise to a soln. of NaBH4 at 0°C, allowed to warm to room temp. and stirred for 16 h; H2O and Et2O added, the aq. layer extd. (Et2O), the combined org. phase washed (H2O, brine), dried (MgSO4), evapd., recrystd. (hexane); elem. anal.;
Nifantyev, E. E.; Gratchev, M. K.; Burmistrov, S. Yu.; Antipin, M. Yu.; Struchkov, Yu. T.
Phosphorus, Sulfur and Silicon and the Related Elements, 1992 , vol. 70, # 1/2 p. 159 - 174