Time-economical synthesis of selenofunctionalized heterocycles via I2O5-mediated selenylative heterocyclization

Author(s):  
Chen-Fan Zhou ◽  
Yun-Qian Zhang ◽  
Yong Ling ◽  
Liang Ming ◽  
Xia Xi ◽  
...  
Keyword(s):  

A time-economical and robust synthesis of various selenofunctionalized heterocycles was accomplished via I2O5-mediated selenocyclizations of olefins with diselenides. Using this method, 116 selenomethyl-substituted heterocycles were synthesized with up to 97%...

Author(s):  
David A. Candito ◽  
Yingchun Ye ◽  
Ryan V. Quiroz ◽  
Michael H. Reutershan ◽  
David Witter ◽  
...  

Author(s):  
P. Melchior ◽  
C. Inarn ◽  
A. Oustaloup

The aim of this paper concerns motion control and robust path tracking. An approach based on fractional prefilter synthesis was already developed. It allows tracking optimization according to the fractional derivation order, the actuators physical constraints and the control loop frequency bandwidth. The purpose of this paper is the extension of this approach to multivariable systems. A non integer prefilter synthesis methodology for square MIMO systems (Multi-Input, Multi-Output) is presented. It is based on the MIMO-QFT robust synthesis methodology, taking into account of the plant uncertainties. MIMO-QFT robust synthesis methodology is based on multiple SISO (MISO systems) synthesis by considering the loop couplings. The SISO-QFT synthesis methodology can be then used for each SISO synthesis. Then the prefilters are synthesized. The prefilter parameter optimization is founded on the prefilter output error integral minimization, taking into account of the actuators physical constraints and the tracking performance specifications. An application example is given.


Author(s):  
Nader Ebrahimi ◽  
Mahmoud Shehadeh ◽  
Kristin McCullough

2020 ◽  
Author(s):  
Maria Sauer ◽  
Veselin Nasufovic ◽  
Hans-Dieter Arndt ◽  
Ivan Vilotijevic

P-rhodamines were accessed by implementing a robust three step sequence consisting of (i) addition of m-metallated anilines to dichlorophosphine oxides, (ii) selective dibromination, and (iii) cyclization of the diaryllithium reagents derived from the dibromides to form the dihydroacridophosphine core of P-rhodamines. A modified route to produce non-symmetric P-rhodamines was additionally developed. A library of the prepared P-rhodamines provides first insight into dependence of fluorophore properties on the structure of P-rhodamines. A P-rhodamine with highest batochromic shifts and quantum yields in the class was identified.


2021 ◽  
Author(s):  
Li-Ting Pan ◽  
Zhuo Pen ◽  
Hai-Rong Yu ◽  
Ting Liang ◽  
Chang-Jing Cheng

Highly charged superparamagnetic Fe3O4 colloidal nanocrystal clusters (CNCs) with uniform and widely tunable sizes can be magnetically assembled into responsive photonic crystals to exhibit rapid and reversible brilliant structural color...


Cellulose ◽  
2019 ◽  
Vol 27 (1) ◽  
pp. 171-184
Author(s):  
Zheng Liu ◽  
Farah Tasnim ◽  
Shujian Ong ◽  
Sabrina Shen ◽  
Xiao Zhong Huang ◽  
...  

2019 ◽  
Vol 17 (23) ◽  
pp. 5698-5702 ◽  
Author(s):  
Chao Zuo ◽  
Bing-Jia Yan ◽  
Han-Ying Zhu ◽  
Wei-Wei Shi ◽  
Tong-Kuai Xi ◽  
...  

A simple-to-operate and highly efficient strategy for the epimerization-free synthesis of C-terminal Cys-containing peptide acids, which avoids the use of derivatization reagents for resin modification, is developed.


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