TY  - THES
A1  - Derese, Solomon
A1  - Yenesew, Abiy
A1  - Midiwo, Jacob O.
A1  - Heydenreich, Matthias
A1  - Peter, Martin G.
T1  - A new isoflavone from stem bark of Millettia dura
Y1  - 2003
SN  - 1011-3924
ER  - 
TY  - JOUR
A1  - Pereira, Fernanda S.
A1  - Nascimento, Heliara D. L.
A1  - Magalhaes, Alvicler
A1  - Peter, Martin G.
A1  - Bataglion, Giovana Anceski
A1  - Eberlin, Marcos N.
A1  - Gonzalez, Eduardo R. P.
T1  - ESI(+)-MS and GC-MS study of the hydrolysis of N-azobenzyl derivatives of chitosan
JF  - Molecules
N2  - New N-p-chloro-, N-p-bromo-, and N-p-nitrophenylazobenzylchitosan derivatives, as well as the corresponding azophenyl and azophenyl-p-sulfonic acids, were synthesized by coupling N-benzylvchitosan with aryl diazonium salts. The synthesized molecules were analyzed by UV-Vis, FT-IR, H-1-NMR and N-15-NMR spectroscopy. The capacity of copper chelation by these materials was studied by AAS. Chitosan and the derivatives were subjected to hydrolysis and the products were analyzed by ESI(+)-MS and GC-MS, confirming the formation of N-benzyl chitosan. Furthermore, the MS results indicate that a nucleophilic aromatic substitution (SnAr) reaction occurs under hydrolysis conditions, yielding chloroaniline from N-p-bromo-, and N-p-nitrophenylazo-benzylchitosan as well as bromoaniline from N-p-chloro-, and N-p-nitrophenylazobenzyl-chitosan.
KW  - chitosan
KW  - N-azobenzylchitosan
KW  - ESI-MS
KW  - GC-MS
KW  - SnAr reaction
Y1  - 2014
U6  - https://doi.org/10.3390/molecules191117604
SN  - 1420-3049
VL  - 19
IS  - 11
SP  - 17604
EP  - 17618
PB  - MDPI
CY  - Basel
ER  - 
TY  - JOUR
A1  - Paz, Cristian
A1  - Peter, Martin G.
A1  - Schmidt, Bernd
A1  - Becerra, Jose
A1  - Gutierrez, Margarita
A1  - Astudillo, Luis
A1  - Silva, Mario
T1  - Synthesis and AChE inhibiting activity of 2, 4 substituted 6-Phenyl Pyrimidines
JF  - Journal of the Chilean Chemical Society
N2  - Novel substituted pyrimidines were synthesized from methyl 2,4-dioxo-4-phenyl-butanoate (I-A) and urea, followed by Mitsunobu coupling of I-A with benzyl or allyl alcohol to give the corresponding 2-hydroxypyrimidine ethers in good yields. Saponification of I-A, followed by reaction with benzyl or allyl amines in the presence of TBTU yielded 2-hydroxy-6-phenyl-pyrimidine 4-carboxamides. AChE and BuChE assays revealed 2-hydroxy-6-phenyl-pyrimidine-4-carboxyallyamide as the most active compound, IC50=90 mu M, with no inhibition of BuChE.
KW  - Pyrimidines
KW  - inhibition AChE
KW  - mitsunobu
KW  - TBTU
Y1  - 2012
SN  - 0717-9324
VL  - 57
IS  - 3
SP  - 1292
EP  - 1294
PB  - Sociedad Chilena De Quimica
CY  - Concepcion
ER  - 
TY  - JOUR
A1  - Letzel, Matthias C.
A1  - Synstad, Bjoenar
A1  - Eijsink, Vincent G. H.
A1  - Peter-Katalinic, Jasna
A1  - Peter, Martin G.
T1  - Libraries of chito-oligosaccharides of mixed acetylation patterns and their interactions with chitinases
Y1  - 1999
SN  - 3-9806494-5-8
ER  -