- Selenium-containing photosensitizer as well as preparation method and application thereof
-
The invention discloses a selenium-containing photosensitizer as well as a preparation method and application thereof. A novel selenium-containing photosensitizer with an anti-tumor angiogenesis effect is synthesized for a first time. The selenium-containing photosensitizer can be applied to treatment on skin scale cancer and is remarkable in effect, the dosage of the selenium-containing photosensitizer is far lower than that of 5-ALA in the market, in addition is free of antibiotics, free of drug resistance and small in side effect, and is safe and non-toxic and economic and practical; in addition, because of the limited light penetration function and other factors, a tumor treatment effect can be achieved even for tumor tissue without light dynamic response through tumor angiogenesis inhibition.
- -
-
Paragraph 0037; 0039; 0040; 0041
(2018/07/07)
-
- Preparation method for pyrrolidine-2-carboxylic acid derivatives
-
The present invention relates to the field of medical synthesis, in particular to a preparation method for pyrrolidine-2-carboxylic acid derivatives. The present invention adopts the following technical solution: providing a compound having a structure of formula (E), wherein R is R1 or R2, R1 is C1-C6 an alkyl, benzyl, p-methoxybenzyl, or p-nitrobenzyl group, and R2 is hydrogen; R3 is a protecting group of the carboxyl group; and P1 is a protecting group on nitrogen.
- -
-
Paragraph 0138; 0139
(2016/06/09)
-
- An enantioselective route to pyrrolidines: Removal of the chiral template from homochiral pyrroloimidazoles
-
Two-step reductive removal of the chiral template from optically active pyrroloimidazoles, available from 1,3-dipolar cycloaddition of homochiral 4,5-dihydroimidazolium ylides, gives optically active substituted pyrrolidines. Selective manipulation of the substituents affords, e.g., naturally occurring and other optically active proline derivatives, and optically active pyrrolizidines and indolizidines.
- Jones, Raymond C.F.,Howard, Kevin J.,Snaith, John S.,Blake, Alexander J.,Li, Wang-Shei,Steel, Peter J.
-
experimental part
p. 8925 - 8936
(2011/12/02)
-
- Method of inhibiting the transport of L-glutamate to treat CNS disorders
-
A method of inhibiting the transport of a neurotransmitter away from the synapse comprising contacting a neurotransmitter transporter with a compound having the structure STR1 wherein STR2 or CONHR 3 in any combination and and wherein R 2 =OR 3, NR 3 2, alkyl, or substituted alkyl and R 3 =alkyl or substituted alkyl.
- -
-
-
- Asymmetric synthesis of 2,4-disubstituted pyrrolidines
-
A new strategy for asymmetric synthesis of 2,4-disubstituted pyrrolidines is described, starting from readily available chiral building blocks 1 and (2R)-2,3-O-isopropylideneglycealdehyde (6).
- Wang, Qian,Sasaki, N. Andre,Potier, Pierre
-
p. 5755 - 5758
(2007/10/03)
-
- Asymmetric synthesis of 4-substituted prolines as conformationally constrained amino acid analogues
-
Treatment of readily available chiral building block 1 with (2R)-2,3-O- isopropylideneglyceraldehyde (5) provides a new route for asymmetric synthesis of 2,4-disubstituted pyrrolidines. Several proline-amino acid chimeras: proline-leucine, proline-lysine, proline-arginine and proline- glutamic acid, are synthesized in highly diastereomerically pure forms.
- Wang, Qian,Sasaki, N. Andre,Potier, Pierre
-
p. 15759 - 15780
(2007/10/03)
-
- Stereospecific synthesis of cis-2,4-pyrrolidinedicarboxylic acid and cis-2,5-piperidinedicarboxylic acid
-
Lactams derived from hetero Diels-Alder adducts were stereospecifically converted into cis-2,4-pyrrolidinedicarboxylic acid and cis-2,5- piperidinedicarboxylic acid by ruthenium tetroxide oxidation. Optically active (2S,4S)-(-)-2,4-pyrrolidinedicarboxylic acid and (2R,4R)-(+)-2,4- pyrrolidinedicarboxylic acid were synthesized from (1S,4R)-(+)-2- azabicyclo[2.2.1]hept-5-en-3-one and (1R,4S)-(-)-2-azabicyclo[2.2.1]hept-5- en-3-one, respectively.
- Arakawa, Yasushi,Yasuda, Mika,Ohnishi, Masafumi,Yoshifuji, Shigeyuki
-
p. 255 - 259
(2007/10/03)
-
- An enantioselective route to pyrrolidines: Removal of the chiral template from homochiral pyrroloimidazoles
-
Two-step reductive removal of the chiral template from optically active pyrroloimidazoles, available from 1,3-dipolar cycloaddition of homochiral imidazolinium ylides, gives optically active substituted pyrrolidines. Selective manipulation of the substituents affords, e.g. naturally occurring proline derivatives and homochiral pyrrolizidines.
- Jones, Raymond C. F.,Howard, Kevin J.,Snaith, John S.
-
p. 1711 - 1714
(2007/10/03)
-
- Asymmetric Synthesis of α-Amino Acids via Cationic Aza-Cope Rearrengements
-
Ene-iminium intermediates resulting from reaction between glyoxal and β-amino alcohols rearrange by an aza-Cope process.Three different tandem reactions are thus carried out; their first component is this cationic rearrangement, the second step being either an iminium hydrolysis, a nucleophile-induced ene-iminium cyclization or a Mannich reaction.The last two sequences lead to homochiral proline derivatives.
- Agami, Claude,Couty, Francois,Lin, Jing,Mikaeloff, Axelle,Poursoulis, Michel
-
p. 7239 - 7250
(2007/10/02)
-
- Conformationally Defined Neurotransmitter Analogues. Selective Inhibition of Glutamate Uptake by One Pyrrolidine-2,4-dicarboxylate Diastereomer
-
In order to determine the conformational requirements for binding of L-glutamate to the proteins involved in the process of neurotransmission, rigid analogues containing an embedded glutamate moiety have been prepared.These "conformer mimics", the pyrrolidine-2,4-dicarboxylates 4, 7, 11, and 14, were synthesized from commercially available trans-4-hydroxy-L-proline and cis-4-hydroxy-D-proline, and then were tested for their ability to inhibit the high-affinity transport of -L-glutamate into synaptosomes and to block the binding of radioligands to the NMDA (N-methyl-D-aspartate), KA (kainate), and QA (quisqualate) glutamate neurotransmitter receptor sites.While none of the four analogues binds effectively to the excitatory receptors, the L-trans-isomer 7 is a potent and selective competitive inhibitor of L-glutamate transport.These results delineate a specific structural/conformational preference for binding to the uptake system that is distinct from that required for binding to the NMDA, KA, and QA receptors.
- Bridges, Richard J.,Stanley, Mark S.,Anderson, Michael W.,Cotman, Carl W.,Chamberlin, A. Richard
-
p. 717 - 725
(2007/10/02)
-
- Synthesis of two cyclic analogs of glutamic acid: cis- and trans-pyrrolidine-2,4-dicarboxylic acids
-
The tosyl ester 2 of tetraethyl 1-acetamido-4-hydroxybutane- 1,1,3,3-tetracarboxylate gave 4-methylene glutammic acid in 90% yield by refluxing with concentrated HC1. Treatment of 2 with NaOEt, then with refluxing concentrated HC1 gave a 54% yield of cis
- Trigalo, Franois,Molliex, Christophe,Champion, Brigitte,Azerad, Robert
-
p. 3049 - 3050
(2007/10/19)
-
- FAST ATOM BOMBARDMENT (FAB) AND CHEMICAL IONIZATION (CI) MASS SPECTROMETRY OF Γ-CARBOXYGLUTAMIC ACID, 5-SUBSTITUTED-4,4-DICARBOXYPROLINES, AND THEIR MONODECARBOXY DERIVATIVES GLUTAMIC ACID AND 5-SUBSTITUTED-4-CARBOXYPROLINES
-
DL-Carboxyglutamic acid (Gla) reacts easily and quantitatively with aldehydes to give the racemic diastereoisomers of 5-substituted-4,4-dicarboxyprolines.After heating at 100 deg C for 30 minutes these amino acids lose a carboxyl group from C-γ of Gla and C-4 of the proline ring to give glutamic acid and the racemic diastereoisomers of cyclic analogs of glutamic acid respectively.This paper reports a study of the above-mentioned compounds by using FAB mass spectrometry in comparison with CI analysis.FAB turned out to be an adequate ionization technique for dealing with such nonvolatile and thermolabile amino acids, and may thus allow the development of a rapid and sensitive method for detecting γ-carboxyglutamic acid urine and in other biological matrices in pathological cases (i.e., renal stones and blood serum).
- Capasso, R.,Pucci, P.,Randazzo, G.,Malorni, A.
-
p. 2177 - 2180
(2007/10/02)
-