Chiral ionic Brønsted acid–achiral Brønsted base synergistic catalysis for asymmetric sulfa-Michael addition to nitroolefins

D Uraguchi, N Kinoshita, D Nakashima, T Ooi - Chemical Science, 2012 - pubs.rsc.org
A highly enantioselective sulfa-Michael addition to aromatic and aliphatic nitroolefins is
achieved under the synergistic catalysis of chiral, ionic Brønsted acid homo-1b· HBArF and …

An improved and mild Wenker synthesis of aziridines

X Li, N Chen, J Xu - Synthesis, 2010 - thieme-connect.com
The conventional Wenker synthesis of aziridines from vicinal amino alcohols has been
modified by employing mild reaction conditions. Amino alcohols were converted into their …

Synthesis of α-Aliphatic and β-Aromatic Substituted Taurines via Regioselective Ring Opening of Thiiranes with Ammonia

H Yu, S Cao, L Zhang, G Liu, J Xu - Synthesis, 2009 - thieme-connect.com
Thiiranes are important starting materials for the synthesis of substituted taurines. The
regioselectivity of ring-opening reactions of thiiranes with ammonia in the presence of silver …

Versatile synthesis of α-substituted taurines from nitroolefins

C Xu, J Xu - Amino Acids, 2011 - Springer
A series of 1-substituted and 1, 1-disubstituted taurines were synthesized from nitroolefins
via the Michael addition with sodium ethylxanthate, oxidation with performic acid, and …

Facile synthesis of hybrid sulfonophosphinodipeptides composing of taurines and 1-aminoalkylphosphinic acids

F Meng, F He, X Song, L Zhang, W Hu, G Liu, J Xu - Amino Acids, 2012 - Springer
Both sulfonopeptides and phosphonopeptides are important analogs of naturally occurring
peptides and have been widely used as enzyme inhibitors and haptens for producing …

Synthesis of gem-disubstituted taurines by the regioselective ring-opening of 2,2-disubstituted aziridines with sodium bisulfite and sulfite

N Chen, M Zhu, W Zhang, DM Du, J Xu - Amino Acids, 2009 - Springer
The regioselectivity of the ring-opening reactions of 2, 2-disubstituted aziridines with sodium
bisulfite and sulfite showed significant divergence depending on the nucleophiles and the …

Practical Corey-Chaykovsky Epoxidation: Scope and Limitation

H Yu, X Deng, S Cao, J Xu - Letters in Organic Chemistry, 2011 - ingentaconnect.com
Corey-Chaykovsky epoxidation is one of the versatile methods for synthesis of structurally
diverse oxiranes. The extension of simplified Corey-Chaykovsky epoxidation has been …

Synthesis of sulfonopeptides

J Xu - Journal of Peptide Science, 2021 - Wiley Online Library
Sulfonopeptides as the sulfur analogues of natural peptides have been widely used as
enzyme inhibitors due to their tetrahedral sulfonamide moiety, which can mimic the transition …

[PDF][PDF] 取代牛磺酸的合成研究进展

许家喜 - 化学试剂, 2011 - researchgate.net
牛磺酸和取代牛磺酸既是一类重要的天然氨基酸, 也是天然蛋白氨基酸的含硫类似物,
具有重要的生理活性. 结合作者课题组的研究工作介绍了近年来取代牛磺酸的合成研究进展 …

HCOOH, an inexpensive, convenient, and practical 13C NMR solvent for strong polar amino acids and their derivatives

N Chen, J Xu - Letters in Organic Chemistry, 2009 - ingentaconnect.com
Amino acids and some of their derivatives are strong polar organic compounds. Non-
deuterated formic acid was used as an inexpensive, convenient, and practical 13C NMR …