57055-05-7Relevant articles and documents
Primary Amination of Ar2P(O)-H with (NH4)2CO3as an Ammonia Source under Simple and Mild Conditions and Its Extension to the Construction of Various P-N or P-O Bonds
Han, Ya-Ping,Tan, Yushi,Yang, Shang-Dong,Zhang, Hong-Yu,Zhang, Yuecheng,Zhao, Jiquan
, (2022/02/10)
A facile and efficient method for the synthesis of primary phosphinamides from Ar2P(O)-H reagents with stable and readily available ammonium carbonate as an ammonia source is disclosed herein for the first time. This ethyl bromoacetate-mediated primary am
Photochemical Reactions of Trialkylammonio-N-diphenylphosphinoylimides: Rearrangement to N-Phosphinoyl Aminals and the Formation of Diphenylphosphinic Amide
Freeman, Sally,Harger, Martin J. P.
, p. 571 - 578 (2007/10/02)
The photolysis of the aminimide Ph2P(O)N--N+Me3 (1) in methanol gives the amide Ph2P(O)NH2 in high yield, but most of this is not formed from (1) directly via the nitrene; rather, it results from (solvolytic) decomposition of the phosphinoyl aminal Ph2P(O)NHCH2NMe2 (5) formed from (1) by a photochemical rearrangement.With Ph2P(O)N--N+Et3 the corresponding rearrangement product Ph2P(O)NHCHMeNEt2 (an ethylidene aminal) is not observed, but this is probably just a consequence of very rapid decomposition.Although substrates bearing both Me and Et groups on the ammonium N atom appear to form only the rearrangement product (a methylene aminal) that results form involvement of a Me group, the yield is reduced substantially relative to the yield of (5) from (1).The size of the reduction is consistent with an Et group participating in the rearrangement about twice as readily as a Me group, but the product (an ethylidene aminal) that results suffering (much) much more rapid decomposition to Ph2P(O)NH2.
DIARYLPHOSPHINIC AZIDES. PHOTOCHEMICAL REACTIONS INCLUDING REARRANGEMENT IN METHANOL
Harger, Martin J.P.,Westlake, Sally
, p. 1511 - 1516 (2007/10/02)
On photolysis in methanol the diarylphosphinic azides Ar2P(O)N3 (Ar=phenyl, p-tolyl, p-anisyl, p-chlorophenyl) rearrange with loss of nitrogen to form (monomeric) metaphosphonimidates which are trapped by the solvent to give methyl NP-diarylphosphonamidates (7) (41-53percent).Diarylphosphinic amides (18-42percent) are also usually formed, presumably from (triplet) nitrenes.The limited evidence available suggests that the rearrangements take place directly from the photo-excited azides rather than via (singlet) nitrene intermediates.One of the products of rearrangement, methyl NP-di(p-chlorophenyl)phosphonamidate, suffers extensive photochemical dechlorination giving methyl N-phenyl-P-p-chlorophenylphosphonamidate.
Hydrolysis of Diarylphosphinic Amides in Acidic Solution: Steric Inhibition and Mechanism
Harger, Martin J. P.
, p. 154 - 160 (2007/10/02)
The pseudo-first-order rate constants for the hydrolysis of diphenylphosphinic amide Ph2P(O)NH2 and its di-p-tolyl, di-o-tolyl, and dimesityl analogues (106kψ 3 630, 2 340, 81.0, and 3.27 s-1 respectively with H(1+) 0.0662M and T 30.2 deg C) in water-dioxan (9:1 v/v) containing perchloric acid show that reaction is sterically hindered by ortho-methyl substituents in the P-aryl groups.Steric inhibition is as great, or greater, in the hydrolysis of the corresponding (N-phenyl)diarylphosphinic amides (106kψ 5 440, 4 470, 54.9 and 0.88 s-1 respectively with H(1+) 1.36M and T 39.9 deg C) and (N-p-nitrophenyldiarylphosphinic amides (106kψ 724, 702, 6.57, and 0.098 s-1 respectively with H(1+) 2.58M and T 39.9 deg C) even though the departing amine is less nucleophilic.Such sensitivity to steric hindrance is consistent with associative (A2) mechanism for the hydrolysis of all the substrates.
