1: allyl alcohol With n-butyllithium in diethyl ether 2: (2-oxo-5,5-diphenyl-oxazolidin-3-yl)-phosphonic acid diethyl ester in diethyl ether; dichloromethane Further stages.;
Shuikin,N.I. et al.
Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1961 , p. 1547 - 1551
Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1961 , # 9 p. 1660 - 1665