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124por Zhang, Kankan, Liang, Xueping, He, Ming, Wu, Jian, Zhang, Yuping, Xue, Wei, Jin, Linhong, Yang, Song, Hu, Deyu“…An efficient one-pot synthesis of novel β-amino acid derivatives containing a thiadiazole moiety was developed using a chiral squaramide cinchona alkaloid as organocatalyst. The reactions afforded chiral β-amino acid derivatives in moderate yields and with moderate to excellent enantioselectivities. …”
Publicado 2013
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125por Ilisz, István, Grecsó, Nóra, Misicka, Aleksandra, Tymecka, Dagmara, Lázár, László, Lindner, Wolfgang, Péter, AntalEnlace del recurso
Publicado 2014
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126“…[Image: see text] A series of 20 one chiral epoxides were obtained with excellent yields (up to 99%) and enantioselectivities (up to >99% ee) using hybrid amide-based Cinchona alkaloids. Our method is characterized by low catalyst loading (0.5 mol %) and short reaction times. …”
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127por Stockhammer, Lotte, Schörgenhumer, Johannes, Mairhofer, Christopher, Waser, Mario“…We herein report an unprecedented strategy for the asymmetric α‐chlorination of β‐keto esters with hypervalent iodine‐based Cl‐transfer reagents using simple Cinchona alkaloid catalysts. Our investigations support an α‐chlorination mechanism where the Cinchona species serves as a nucleophilic catalyst by reacting with the chlorinating agent to generate a chiral electrophilic Cl‐transfer reagent in situ. …”
Publicado 2020
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128por Al-Harbi, Laila Naif, Al-Shammari, Ghedier M., Subash-Babu, Pandurangan, Mohammed, Mohammed A., Alkreadees, Roaa Ahmed, Yagoub, Abu ElGasim Ahmed“…In vitro cytotoxicity analyses of Cinchona officinalis extract, ferrous oxide, and Cinchona officinalis extract-loaded iron oxide nanoparticles (CO-NPs) were carried out using the MTT test for 24 h and 48 h. …”
Publicado 2022
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129por Canales, Nataly Allasi, Pérez-Escobar, Oscar A., Powell, Robyn F., Töpel, Mats, Kidner, Catherine, Nesbitt, Mark, Maldonado, Carla, Barnes, Christopher J., Rønsted, Nina, Przelomska, Natalia A. S., Leitch, Ilia J., Antonelli, Alexandre“…The Andean fever tree (Cinchona L.; Rubiaceae) is a source of bioactive quinine alkaloids used to treat malaria. …”
Publicado 2022
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130por Sumiyoshi, Takaaki, Urabe, Daisuke, Tojo, Kengo, Sakamoto, Masato, Niidome, Kazumi, Tsuboya, Norie, Nakajima, Tomoko, Tobe, Masanori“…This synthesis is based on optimization of the cinchona alkaloid catalyzed addition of 6-bromoindole to ethyl trifluoropyruvate and Negishi coupling of zinc cyanide to the 6-bromoindole moiety. [(14)C] Labeled (−)-{4-[(1-{2-[6-cyano-1-(cyclohexylmethyl)-1H-indol-3-yl]-3,3,3-trifluoro-2-hydroxypropyl}piperidin-4-yl)oxy]-3-methoxyphenyl}acetic acid (−)-1 was synthesized successfully with high enantioselectivity (>99% ee) and sufficient radiochemical purity.…”
Publicado 2012
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131“…Cinchona alkaloid-derived organocatalysts are widely employed in various asymmetric transformations, yielding products with high enantiopurity. …”
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132por Xiao, Han, Wu, Fang, Shi, Li, Chen, Zhiwei, Su, Shihu, Tang, Chenghao, Wang, Hongtao, Li, Zhining, Li, Meichuan, Shi, Qingcai“…An efficient synthesis of highly functionalized chiral β-amino ester derivatives containing benzothiophene and benzothiazole moieties is developed by a Mannich-type reaction using a cinchona alkaloid-derived thiourea catalyst. The desired products were obtained in good yields and high enantioselectivities (~86% yield, >99% ee) using to the optimized reaction conditions. …”
Publicado 2014
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133“…In the present study, four of the plant metabolites, 14-deoxy-11,12-didehydroandrographolide, andrograpanin, quinine, cinchonine from two eminent medicinal plants Andrographis paniculata and Cinchona officinalis, have been evaluated against the main protease of SARS-CoV-2 through in-silico molecular docking and molecular dynamics simulation study. …”
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135por Jernei, Tamás, Duró, Cintia, Dembo, Antonio, Lajkó, Eszter, Takács, Angéla, Kőhidai, László, Schlosser, Gitta, Csámpai, Antal“…By means of copper(I)-and ruthenium(II)-catalyzed click reactions of quinine- and quinidine-derived alkynes with azide-substituted chalcones a systematic series of novel cinchona-chalcone hybrid compounds, containing 1,4-disubstituted- and 1,5-disubstituted 1,2,3-triazole linkers, were synthesized and evaluated for their cytotoxic activity on four human malignant cell lines (PANC-1, COLO-205, A2058 and EBC-1). …”
Publicado 2019
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136por Fabiano-Tixier, Anne-Sylvie, Elomri, Abdelhakim, Blanckaert, Axelle, Seguin, Elisabeth, Petitcolas, Emmanuel, Chemat, Farid“…Identified from barks of Cinchona, quinine is still commonly used to treat human malaria. …”
Publicado 2011
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138por Károlyi, Benedek Imre, Bősze, Szilvia, Orbán, Erika, Sohár, Pál, Drahos, László, Gál, Emese, Csámpai, AntalEnlace del recurso
Publicado 2012
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139por Kumar, Barun, Kodliwadmath, Ashwin, Upadhyay, Amar Nath, Nath, Ranjit Kumar, Pandit, Neeraj, Wardhan, Harsh, Singh, AnupamEnlace del recurso
Publicado 2022
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140por Fukushima, Takeshi, Sugiura, Anna, Furuta, Ippei, Iwasa, Sumiko, Iizuka, Hideaki, Ichiba, Hideaki, Onozato, Mayu, Hikawa, Hidemasa, Yokoyama, Yuusaku“…The optical purity was examined by conducting high-performance liquid chromatography with a Cinchona alkaloid-based zwitterionic chiral stationary phase (CSP) [CHIRALPAK(®) ZWIX(+)], which bears a chiral trans-2-aminocyclohexanesulfonic acid moiety tagged at C-9 of the Cinchona alka-loid. …”
Publicado 2015
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