Intramolecular Hydrogen-Bond Participation in Phosphonylammonium Salt Formation
摘要:
A series of phosphonochloridates and phosphonyl dichlorides were prepared, and their reactivity with triethylamine has been investigated using P-31 NMR spectroscopy, Taken together these studies provide evidence that an intramolecular hydrogen-bond is required for phosphonylammonium salt formation to render the phosphorus more electron-deficient.
Intramolecular Hydrogen-Bond Participation in Phosphonylammonium Salt Formation
摘要:
A series of phosphonochloridates and phosphonyl dichlorides were prepared, and their reactivity with triethylamine has been investigated using P-31 NMR spectroscopy, Taken together these studies provide evidence that an intramolecular hydrogen-bond is required for phosphonylammonium salt formation to render the phosphorus more electron-deficient.
A Pd(II)-catalyzed C-H phosphorylation reaction has been developed using heterocycle-directed ortho-palladation. Both H-phosphonates and diaryl phosphine oxides are suitable coupling partners for this reaction.
A highly efficient, AgI/K2S2O8-mediated regioselectivephosphonation reaction has been developed by using electron-deficient directing groups. These phosphonation reactions were performed with N,N-dialkylbenzamides, N,N-dialkylbenzenesulfonamides, and nitrobenzene. This method has a broad substrate scope and offers facile construction of C–P bonds.
1H-1,3-Benzazaphospholes: The Organometallic Route and a New Three-Step Synthesis with Reductive Ring Closure
作者:Raj K. Bansal、Neelima Gupta、Joachim Heinicke、George N. Nikonov、Farida Saguitova、Dinesh C. Sharma
DOI:10.1055/s-1999-3394
日期:1999.2
Primary and N-secondary 2-phosphanylanilines were synthesized via metallation of 2-bromoanilines, coupling with ClP(NMe2)2, alcoholysis and reduction with LiAlH4, and subsequently reacted with formimidoester hydrochloride to give 1,3-benzazaphospholes. For 1H-1,3-benzazaphospholes, a shorter alternative three-step synthesis was developed, based on N-acylation of 2-bromoaniline, NiCl2-catalyzed arylation of triethyl phosphite and a new reductive cyclization of amidophosphonic acid este with excess LiAlH4.
Manganese-Catalyzed and Mediated Synthesis of Arylphosphinates and Related Compounds
作者:Olivier Berger、Jean-Luc Montchamp
DOI:10.1021/acs.joc.9b01239
日期:2019.7.19
H-phosphinates and relatedcompounds was examined. A practical catalytic process with the air as the oxidant could not be found. However, an inexpensive and robust methodology was developed, using catalytic Mn(II) as the radical initiator and excess Mn(IV) as the stoichiometric oxidant. Using these conditions, the inter- and intramolecular arylation of phosphinylidene compounds has a broad scope, including
Design and Synthesis of Small Molecule Glycerol 3-Phosphate Acyltransferase Inhibitors
作者:Edward A. Wydysh、Susan M. Medghalchi、Aravinda Vadlamudi、Craig A. Townsend
DOI:10.1021/jm900251a
日期:2009.5.28
mass is growing rapidly, particularly in the United States. Glycerol3-phosphate acyltransferase (GPAT) catalyzes the rate-limiting step of glycerolipid biosynthesis, the acylation of glycerol3-phosphate with saturated long-chain acyl-CoAs. In an effort to produce small molecule inhibitors of this enzyme, a series of benzoic and phosphonicacids was designed and synthesized. In vitro testing of this series