Zobrazeno 1 - 10
of 198
pro vyhledávání: '"Louis A, Carpino"'
Autor:
René Röder, Hardy Weißhoff, Clemens Mügge, Ulrich S. Schubert, Louis A. Carpino, Peter Henklein, Petra Henklein, Michael Pätzel
Publikováno v:
Journal of Peptide Science. 16:65-70
To prevent aspartimide formation and related side products in Asp-Xaa, particularly Asp-Gly-containing peptides, usually the 2-hydroxy-4-methoxybenzyl (Hmb) backbone amide protection is applied for peptide synthesis according to the Fmoc-protocols. I
Autor:
Eberhard Krause, Adel Ali Abdel-Maksoud, Holger Wenschuh, Ayman El-Faham, Michael Beyermann, Michael Bienert, Peter Henklein, Louis A. Carpino, Dumitru Ionescu, Khaled Nasr
Publikováno v:
Organic letters, 11(16): 3718–3721
The N-dicyclopropylmethyl (Dcpm) residue, introduced into amino acids via reaction of dicyclopropylmethanimine hydrochloride with an amino acid ester followed by sodium cyanoborohydride or triacetoxyborohydride reduction, can be used as an amide bond
Autor:
E.-S. M. E. Mansour, Louis A. Carpino, Mohamed A. Zewail, Adel Ali Abdel-Maksoud, Dumitru Ionescu
Publikováno v:
The Journal of Organic Chemistry. 72:1729-1736
Of the three theoretically possible, Bsmoc-related, naphthothiophene sulfone-based amino-protecting groups, the two most readily available derivatives, the alpha- and beta-Nsmoc analogues, have been examined as substitutes for the Bsmoc residue in ca
Autor:
Louis A. Carpino, Calin Dan Sferdean, Irene Coin, Michael Beyermann, Michael Bienert, Eberhard Krause, Rudolf Dolling
Publikováno v:
The Journal of Organic Chemistry. 71:6171-6177
The depsipeptide technique is a recently developed method for peptide synthesis which is applicable to difficult sequences when the synthetic difficulty arises because of aggregation phenomena. In the present work, application of the depsipeptide met
Publikováno v:
Tetrahedron Letters. 46:1361-1364
N→O acyl migrations at serine or threonine residues in peptides or proteins have previously been observed upon treatment with strong acids. Here we show that the extent of such N→O shifts depends on the peptide sequence and even in the presence o
Autor:
Louis A. Carpino, Michael Schümann, Eberhard Krause, Calin Dan Sferdean, Heinz Fabian, Michael Beyermann, Michael Bienert
Publikováno v:
Tetrahedron Letters. 45:7519-7523
Recently a 26-mer peptide 1 incorporating Ser and Thr was described as a ‘difficult’ sequence that could not be synthesized by standard methods. If the first Ser residue was used to incorporate a depsipeptide unit, the resulting hybrid was readil
Publikováno v:
The Journal of Organic Chemistry. 69:62-71
Organophosphorus esters 9, 10, 14, and 15 prepared via reaction of diethyl- and diphenylphosphoryl chloride, di(o-tolyl)phosphinyl chloride, and 2,8-dimethylphenoxaphosphinyl chloride with HOAt are excellent coupling reagents for peptide synthesis wh
Autor:
Mohamed Ismail, George A. Truran, Louis A. Carpino, Gary A. Siwruk, Morgan Barry A, Shahnaz Ghassemi, Dumitru Ionescu, Elsayed Mansour, Dean Sadat-Aalaee, and John S. Eynon
Publikováno v:
Organic Process Research & Development. 7:28-37
The Fmoc/TAEA and Bsmoc/TAEA methods for the rapid, continuous solution synthesis of peptide segments are shown to be applicable to the gram-scale synthesis of short peptides as well as, for the first time, to the synthesis of a relatively long (22-m
Autor:
Louis A. Carpino, Michael Philbin
Publikováno v:
The Journal of Organic Chemistry. 64:4315-4323
A new type of amino-protecting group is described in which a Michael acceptor is incorporated into the protectant so that treatment with a nucleophile will trigger deblocking. Comparison of various Michael acceptors showed that for several key electr
Autor:
Ralf Warrass, George A. Truran, Dumitru Ionescu, Shin Iguchi, Louis A. Carpino, Mohamed Ismail, Ayman El-Faham, Christoph Riemer, Elsayed Mansour
Publikováno v:
The Journal of Organic Chemistry. 64:4324-4338
Full details are presented for use of the Bsmoc amino-protecting group for both solid phase and rapid continuous solution syntheses. Application to the latter methodology represents a significant improvement over the corresponding Fmoc-based method f