New phosphoroamidate compounds: Synthesis, structural characterization and studies on ZnCl2 assisted hydrolysis of the P–N bond

o-Phthalaldehyde catalyzed hydrolysis of organophosphinic amides and other P([double bond, length as m-dash]O)-NH containing compounds

Over 50 years ago, Jencks and Gilchrist showed that formaldehyde catalyses the hydrolysis of phosphoramidate through electrophilic activation, induced by covalent attachment to its nitrogen atom. Given our interest in the use of aldehydes as catalysts, this work was revisited to identify a superior catalyst, o-phthalaldehyde, which facilitates hydrolyses of various organophosphorus compounds bearing P([double bond, length as m-dash]O)-NH subunits under mild conditions. Interestingly, chemoselective hydrolysis of the P([double bond, length as m-dash]O)-N bonds could be accomplished in the presence of P([double bond, length as m-dash]O)-OR bonds.

1,1′-Binaphthyl-2,2′-diyl benzylphosphoramidate

In the title compound, C₂₇H₂₀NO₃P, the P atom exhibits a somewhat distorted PNO₃ tetra­hedral geometry, with the O—P—O angle for the binaphthyl fragment being 102.82 (6)°. The dihedral angle between the naphthyl ring systems is 59.00 (2)°. In the crystal, inversion dimers linked by pairs of N—H⋯O hydrogen bonds generate R₂²(8) loops.