... Synlett 2009(2): 287-291 DOI: 10.1055 ... The ³¹ P NMR experiments rapidly established that 2.2 equivalents of DIBAL-H would reduce commercial ethyldiphenylphosphinite quantitatively to diphenylphosphine in one hour at 50 ˚C in C 6 D 6 . Addition of 1.1 equivalents of BH ...