Issue 2, 2016
From the journal:

Organic Chemistry Frontiers

Equilibrium acidities of cinchona alkaloid organocatalysts bearing 6′-hydrogen bonding donors in DMSO†

Xiang Ni,ab   Xin Li*ab  and  Jin-Pei Chengbc  

* Corresponding authors

a State Key Laboratory of Elemento-Organic Chemistry, Department of Chemistry, Nankai University, Tianjin 300071, China
E-mail: xin_li@nankai.edu.cn

b Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300071, China

c Center of Basic Molecular Science, Department of Chemistry, Tsinghua University, Beijing 100084, China

Abstract

The pKa values of 18 cinchona alkaloid based organocatalysts bearing 6′-hydrogen bonding donors were determined by the overlapping indicator method in DMSO via UV spectrophotometric titrations. The pKa values are in the range of 6.76–20.24.

Graphical abstract: Equilibrium acidities of cinchona alkaloid organocatalysts bearing 6′-hydrogen bonding donors in DMSO

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Article information

DOI
https://doi.org/10.1039/C5QO00305A
Article type
Research Article
Submitted
02 Oct 2015
Accepted
07 Dec 2015
First published
09 Dec 2015

Org. Chem. Front., 2016,3, 170-176

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Equilibrium acidities of cinchona alkaloid organocatalysts bearing 6′-hydrogen bonding donors in DMSO

X. Ni, X. Li and J. Cheng, Org. Chem. Front., 2016, 3, 170 DOI: 10.1039/C5QO00305A

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