13138-37-9Relevant academic research and scientific papers
Tritylamine (triphenylmethylamine) in organic synthesis; III. The synthesis of 1-aminoalkylphosphonic acids in the reaction of N-(triphenylmethyl) alkanimines with phosphorus trichloride in acetic acid or with phosphonic (phosphorous) acid in acetic anhydride
Goldeman, Waldemar,Soroka, Miroslaw
experimental part, p. 360 - 369 (2011/02/27)
The reaction of phosphorus trichloride in acetic acid or phosphonic (phosphorous) acid in acetic anhydride, with N-(triphenylmethyl)alkanimines gives 1-acetylaminoalkylphosphonic acids 1a-j, which after hydrolysis give 1-aminoalkylphosphonic acids 2a-j in good yields. ARKAT USA, Inc.
Efficient synthesis of phosphonodepsipeptides derived from norleucine
Pícha, Jan,Budě?ínsky, Milo?,Han?lová, Ivona,?anda, Miloslav,Fiedler, Pavel,Vaněk, Václav,Jirá?ek, Ji?í
experimental part, p. 6090 - 6103 (2011/03/18)
In the present work, we describe in detail an efficient solution synthesis of norleucine-derived phosphonopeptides mimicking the peptide sequences Nle-Gly(Ala) and Nle-Gly(Ala)-Val. The most efficient strategy involved use of the benzyl group. The synthesis was achieved through BOP-catalysed coupling of the monobenzyl ester of the N-Cbz-protected phosphonate derivative of norleucine with the hydroxyl moieties of derivatised l-lactic or glycolic acid. Subsequently, complete deprotection of the products was achieved in good yields by one-step Pd-catalysed hydrogenolysis. We also prepared the Fmoc-Nle-Ψ[PO(OH)O]-CH2-COOH synthon and demonstrated that this precursor is a suitable building block for the solid-phase synthesis of cysteine-containing phosphonopeptides.
Synthesis of norleucine-derived phosphonopeptides
Pícha, Jan,Budě?ínsky, Milo?,?anda, Miloslav,Jirá?ek, Ji?í
, p. 4366 - 4368 (2008/12/21)
The synthesis of norleucine-derived phosphonopeptides was achieved by BOP-catalyzed coupling of the monobenzyl ester of a N-CBz-protected phosphonate derivative of norleucine with hydroxyl moieties of derivatized lactic or glycolic acids. The complete deprotection of the product esters/carbamates was achieved in good yields by one-step Pd-catalyzed hydrogenolysis.
ORGANOPHOSPHORUS COMPOUNDS AS POTENTIAL FUNGICIDES. PART II. AMINOALKANE-, GUANIDINOALKANE-, AND THIOUREIDOALKANE-PHOSPHONIC ACIDS: PREPARATION, SPECTROSCOPY, AND FUNGICIDAL ACTIVITY
Cameron, David G.,Hudson, Harry R.,Pianka, Max
, p. 21 - 38 (2007/10/02)
A range of α-amino-, ω-amino-, α-guanidino-, and ω-guanidinoalkanephosphonic acids has been prepared for the purpose of studying their spectroscopic features and fungicidal activity.In addition, α-thioureido-octanephosphonic acid and thioureylene-1,1-bis(1-octanephosphonic acid) were isolated during the preparation of α-guanidino-octanephosphonic acid. 31P, 1H, and 13C nmr spectral data which were obtained for solutions of the amino- and guanidino-compounds in D2O or D2O/D2SO4, and for the thioureido compounds in DMSO-d6, are discussed together with previouslyreported data for the aminophosphonic types.FAB mass spectrometry generally gives strong pseudomolecular ions + for the zwitterionic amino- and guanidino-compounds with relatively simple fragmentations.Fungicidal activity of the α-aminophosphonic acids was found to be greater than for the ω-amino compounds, with maximum activity at a chain length of three carbon atoms when used as a seed dressing for the control of Drechslera spp.Moderately good activity was shown by the thioureido compounds against a number of fungal organisms in vitro but the guanidino-compounds exhibited low activity.Key words: Organophosphorus; fungicides; aminophosphonic acids; guanidinophosphonic acids; NMR spectroscopy; FAB mass spectroscopy.
1-Aminoalkanephosphonic acids. Addition of diethyl phosphite to N-diisobutylaluminio-aldimines
Kudzin, Zbigniew H.,Majchrzak, Michal W.
, p. 245 - 248 (2007/10/02)
A new route to 1-aminoalkanephosphonic acids starting from nitriles has been elaborated.The nitriles are reduced by Dibal-H into imine derivatives; addition with diethyl phosphite gives the corresponding 1-aminoalkanephosphonates.Hydrolysis of latter compounds gives the 1-aminoalkanephosphonic acids.
Enkephalin analogs and a process for the preparation thereof
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, (2008/06/13)
The invention relates to new enkephalin analogues of the general formula (I), wherein Tyr, Gly and Phe represent L-tyrosyl, glycyl and L-phenylalanyl residue, respectively, X is glycyl residue or a D-α-aminocarboxylic acid residue with a lower alkyl, lowe
