Results 31 to 40 of about 5,409,859 (340)

Catalytic Enantioselective Methylene C(sp3)-H Amidation of 8-Alkylquinolines Using Cp*RhIII/Chiral Carboxylic Acid System.

open access: yesAngewandte Chemie, 2019
The catalytic enantioselective directed methylene C(sp 3 )-H amidation reactions of 8-alkylquinolines using a Cp*Rh III /chiral carboxylic acid (CCA) hybrid catalytic system is described.
Seiya Fukagawa   +3 more
semanticscholar   +1 more source

Indole-3-Carboxylic Acid Enhanced Anti-cancer Potency of Doxorubicin via Induction of Cellular Senescence in Colorectal Cells [PDF]

open access: yesActa Poloniae Pharmaceutica
Background: Colorectal cancer (CRC) is the most common gastrointestinal malignancy. Doxorubicin (DOX) is a widely utilized chemotherapy drug, but its efficacy is limited due to dose-dependent toxicity.
Yao Zhou   +4 more
doaj   +1 more source

Facile synthesis of cooperative acid-base catalysts by clicking cysteine and cysteamine on an ethylene-bridged periodic mesoporous organosilica [PDF]

open access: yes, 2016
A periodic mesoporous organosilica (PMO) that contains ethylene bridges was functionalized to obtain a series of cooperative acid-base catalysts. A straightforward, single-step procedure was devised to immobilize cysteine and cysteamine on the support ...
Esquivel Merino, Maria Dolores   +6 more
core   +2 more sources

Bromopyrrole alkaloids from the caribbean sponge Agelas cerebrum

open access: yesQuĂ­mica Nova, 2011
Bioguided fractionation of Agelas cerebrum crude extract resulted in isolation of four bromopyrrole and four bromopyrrole aminoimidazole alkaloids, identified as 5-bromopyrrole-2-carboxylic acid (1), 4-bromopyrrole-2-carboxylic acid (2), 3,4-bromopyrrole-
Erik L. Regalado   +4 more
doaj   +1 more source

Acrylic acid plasma coated 3D Scaffolds for Cartilage tissue engineering applications [PDF]

open access: yes, 2018
The current generation of tissue engineered additive manufactured scaffolds for cartilage repair shows high potential for growing adult cartilage tissue.
Cools, Pieter   +6 more
core   +2 more sources

Chiral Carboxylic Acid Enabled Achiral Rhodium(III)-Catalyzed Enantioselective C-H Functionalization.

open access: yesAngewandte Chemie, 2018
Reported is an achiral Cpx RhIII /chiral carboxylic acid catalyzed asymmetric C-H alkylation of diarylmethanamines with a diazomalonate, followed by cyclization and decarboxylation to afford 1,4-dihydroisoquinolin-3(2H)-one. Secondary alkylamines as well
Luqing Lin   +5 more
semanticscholar   +1 more source

The role of salicylic acid, L-ascorbic acid and oxalic acid in promoting the oxidation of alkenes with H(2)O(2) catalysed by [Mn(IV) (2)(O)(3)(tmtacn)(2)](2+) [PDF]

open access: yes, 2008
The role played by the additives salicylic acid, L-ascorbic acid and oxalic acid in promoting the catalytic activity of [Mn(IV) (2)(O)(3)(tmtacn)(2)](PF(6))(2) {1(PF(6))(2), where tmtacn = N, N ', N ''-trimethyl-1,4,7-triazacyclononane} in the ...
Alsters, Paul L.   +5 more
core   +2 more sources

Heterocycles [h]-Fused Onto 4-Oxoquinoline-3-Carboxylic Acid, Part VIII [1]. Convenient Synthesis and Antimicrobial Properties of Substituted Hexahydro[1,4]diazepino[2,3-h]quinoline-9-carboxylic acid and Its Tetrahydroquino[7,8-b]benzodiazepine Analog

open access: yesMolecules, 2008
[1,4]Diazepino[2,3-h]quinolone carboxylic acid 3 and its benzo-homolog tetrahydroquino[7,8-b]benzodiazepine-3-carboxylic acid 5 were prepared via PPAcatalyzed thermal lactamization of the respective 8-amino-7-substituted-1,4-dihydroquinoline-3-carboxylic
Yusuf M. Al-Hiari   +2 more
doaj   +1 more source

Synthesis of biodegradable polyesteramides with pendant functional groups [PDF]

open access: yes, 1992
Morpholine-2,5-dione derivatives having substituents with benzyl-protected carboxylic acid, benzyloxycarbonyl-protected amine and p-methoxy-protected thiol groups, respectively, were prepared in 29-58% yield by cyclization of the corresponding N-[(2RS ...
Dijkstra, Pieter J.   +2 more
core   +3 more sources

DSSC Anchoring Groups: A Surface Dependent Decision [PDF]

open access: yes, 2014
Electrodes in dye sensitised solar cells (DSSCs) are typically nanocrystalline anatase TiO2 with a majority (101) surface exposed. Generally the sensitising dye employs a carboxylic anchoring moiety through which it adheres to the TiO2 surface.
Bowler, David R., O'Rourke, Conn
core   +2 more sources

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