Ytterbium Triflate Catalyzed Ring Opening of Aziridines with Amines

Heterocycles ◽  
1996 ◽  
Vol 43 (11) ◽  
pp. 2473 ◽  
Author(s):  
Yoshinori Yamamoto ◽  
Masaki Meguro
Keyword(s):  
Ring Opening ◽  
Ytterbium Triflate

ChemInform Abstract: Ytterbium Triflate Catalyzed Ring Opening of Aziridines with Amines.

ChemInform ◽  
2010 ◽  
Vol 26 (10) ◽  
pp. no-no
Author(s):  
M. MEGURO ◽  
N. ASAO ◽  
Y. YAMAMOTO
Keyword(s):  
Ring Opening ◽  
Ytterbium Triflate

Ytterbium triflate catalyzed ring opening of aziridines with amines

1994 ◽  
Vol 35 (40) ◽  
pp. 7395-7398 ◽  
Author(s):  
Masaki Meguro ◽  
Naoki Asao ◽  
Yoshinori Yamamoto
Keyword(s):  
Ring Opening ◽  
Ytterbium Triflate

Amino-functional polyethers: versatile, stimuli-responsive polymers

2020 ◽  
Vol 11 (24) ◽  
pp. 3940-3950 ◽  
Author(s):  
Patrick Verkoyen ◽  
Holger Frey
Keyword(s):  
Ring Opening ◽  
Review Article ◽  
Stimuli Responsive ◽  
New Class ◽  
Stimuli Responsive Polymers ◽  
Responsive Polymers

Amino-functional polyethers have emerged as a new class of “smart”, i.e. pH- and thermoresponsive materials. This review article summarizes the synthesis and applications of these materials, obtained from ring-opening of suitable epoxide monomers.

Reversible Oxidative-Addition and Reductive-Elimination of Thiophene from a Titanium Complex and Its Thermally-Induced Hydrodesulfurization Chemistry

2019 ◽  
Author(s):  
Alejandra Gomez-Torres ◽  
J. Rolando Aguilar-Calderón ◽  
Carlos Saucedo ◽  
Aldo Jordan ◽  
Alejandro J. Metta-Magaña ◽  
...  
Keyword(s):  
Dft Calculations ◽  
Ring Opening ◽  
Thiophene Ring ◽  
Oxidative Addition ◽  
Reductive Elimination ◽  
Thermally Induced ◽  
Titanium Complex

<p>The masked Ti(II) synthon (<sup>Ket</sup>guan)(<i>η</i><sup>6</sup>-Im<sup>Dipp</sup>N)Ti (<b>1</b>) oxidatively adds across thiophene to give ring-opened (<sup>Ket</sup>guan)(Im<sup>Dipp</sup>N)Ti[<i>κ</i><sup>2</sup>-<i>S</i>(CH)<sub>3</sub><i>C</i>H] (<b>2</b>). Complex <b>2</b> is photosensitive, and upon exposure to light, reductively eliminates thiophene to regenerate <b>1</b> – a rare example of early-metal mediated oxidative-addition/reductive-elimination chemistry. DFT calculations indicate strong titanium π-backdonation to the thiophene π*-orbitals leads to the observed thiophene ring opening across titanium, while a proposed photoinduced LMCT promotes the reverse thiophene elimination from <b>2</b>. Finally, pressurizing solutions of <b>2 </b>with H<sub>2</sub> (150 psi) at 80 °C leads to the hydrodesulfurization of thiophene to give the Ti(IV) sulfide (<sup>Ket</sup>guan)(Im<sup>Dipp</sup>N)Ti(S) (<b>3</b>) and butane. </p>

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