Selection of Planar Chiral Conformations between Pillar[5, 6]arenes Induced by Amino Acid Derivatives in Aqueous Media

Author(s):  
Yuan Chen ◽  
Lulu Fu ◽  
Baobao Sun ◽  
Cheng Qian ◽  
Srikala Pangannaya ◽  
...  
2001 ◽  
Vol 3 (18) ◽  
pp. 2823-2826 ◽  
Author(s):  
M. Pilar López-Deber ◽  
Luis Castedo ◽  
Juan R. Granja

2020 ◽  
Vol 22 (6) ◽  
pp. 2266-2270 ◽  
Author(s):  
Yuan Chen ◽  
Lulu Fu ◽  
Baobao Sun ◽  
Cheng Qian ◽  
Ruibing Wang ◽  
...  

Molecules ◽  
2021 ◽  
Vol 26 (17) ◽  
pp. 5166
Author(s):  
Dominika Iwan ◽  
Karolina Kamińska ◽  
Elżbieta Wojaczyńska

Carbon–carbon bond forming reactions, such as aldol reaction and condensation, belong to extremely desired transformations as manifested by >25,000 entries in SciFinder. Their stereoselective variant requires the use of an appropriate catalyst with a strictly defined structure. Hence, chiral 2-azabicycloalkane-based catalysts were designed, synthesized and tested in a stereoselective aldol reaction between cyclic/acyclic ketone and p-nitrobenzaldehyde both in organic and aqueous media. Among catalysts containing a chiral bicyclic backbone, amide based on 2-azabicyclo[3.2.1]octane and pyrrolidine units showed the best catalytic activity and afforded aldol product in excellent chemical yields (up to 95%) and good diastereo- and enantioselectivity (dr 22:78, ee up to 63%).


ChemInform ◽  
2010 ◽  
Vol 33 (2) ◽  
pp. no-no
Author(s):  
M. Pilar Lopez-Deber ◽  
Luis Castedo ◽  
Juan R. Granja

2020 ◽  
Vol 15 ◽  
Author(s):  
Shulin Zhao ◽  
Ying Ju ◽  
Xiucai Ye ◽  
Jun Zhang ◽  
Shuguang Han

Background: Bioluminescence is a unique and significant phenomenon in nature. Bioluminescence is important for the lifecycle of some organisms and is valuable in biomedical research, including for gene expression analysis and bioluminescence imaging technology.In recent years, researchers have identified a number of methods for predicting bioluminescent proteins (BLPs), which have increased in accuracy, but could be further improved. Method: In this paper, we propose a new bioluminescent proteins prediction method based on a voting algorithm. We used four methods of feature extraction based on the amino acid sequence. We extracted 314 dimensional features in total from amino acid composition, physicochemical properties and k-spacer amino acid pair composition. In order to obtain the highest MCC value to establish the optimal prediction model, then used a voting algorithm to build the model.To create the best performing model, we discuss the selection of base classifiers and vote counting rules. Results: Our proposed model achieved 93.4% accuracy, 93.4% sensitivity and 91.7% specificity in the test set, which was better than any other method. We also improved a previous prediction of bioluminescent proteins in three lineages using our model building method, resulting in greatly improved accuracy.


2014 ◽  
Vol 14 (7) ◽  
pp. 984-993 ◽  
Author(s):  
Gabriela Luna-Palencia ◽  
Federico Martinez-Ramos ◽  
Ismael Vasquez-Moctezuma ◽  
Manuel Fragoso-Vazquez ◽  
Jessica Mendieta-Wejebe ◽  
...  

2019 ◽  
Vol 34 (1) ◽  
pp. 1247-1258 ◽  
Author(s):  
Asmaa F. Kassem ◽  
Gaber O. Moustafa ◽  
Eman S. Nossier ◽  
Hemat S. Khalaf ◽  
Marwa M. Mounier ◽  
...  

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