Thermal and Photocontrol of the Equilibrium between a 2-Phosphinoazobenzene and an Inner Phosphonium Salt

2005 ◽  
Vol 127 (34) ◽  
pp. 11954-11955 ◽  
Author(s):  
Masaki Yamamura ◽  
Naokazu Kano ◽  
Takayuki Kawashima
Keyword(s):  
Phosphonium Salt

Synthesis of 8-HEPE and 10-HDoHE in both (R)- and (S)-Forms via Wittig Reactions with COOH-Ylides

Synlett ◽  
2019 ◽  
Vol 30 (03) ◽  
pp. 338-342
Author(s):  
Yuta Suganuma ◽  
Shun Saito ◽  
Yuichi Kobayashi
Keyword(s):  
Docosahexaenoic Acid ◽  
Eicosapentaenoic Acid ◽  
Wittig Reaction ◽  
Phosphonium Salt ◽  
Wittig Reactions

Wittig reactions using carboxy (CO2H) ylides derived from a carboxylic phosphonium salt and NaN(TMS)2 (NaHMDS) in a 1:1 ratio were applied to the synthesis of 8-HEPE and 10-HDoHE, which are metabolites of eicosapentaenoic acid and docosahexaenoic acid, respectively. The attempted Wittig reaction of 3-(TBS-oxy)pentadeca-4E,6Z,9Z,12Z-tetraenal with the carboxy ylide (2 equiv) derived from Br– Ph3P+(CH2)4CO2H and NaHMDS (1:1) competed with the elimination of the TBS-oxy group at C3 to give a mixture of the Wittig product and the elimination product in 45–50% and 30–40% yields, respectively. The elimination was suppressed completely by using three equiv of the carboxy ylides in THF/HMPA (7–8:1), and the subsequent desilylation gave 8-HEPE in (R)- and (S)-forms. Similarly, both enantiomers of 10-HDoHE were synthesized.

scholarly journals Plasma‐Assisted Immobilization of a Phosphonium Salt and Its Use as a Catalyst in the Valorization of CO 2

ChemSusChem ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1825-1833 ◽  
Author(s):  
Yuya Hu ◽  
Sandra Peglow ◽  
Lars Longwitz ◽  
Marcus Frank ◽  
Jan Dirk Epping ◽  
...  
Keyword(s):  
Phosphonium Salt

scholarly journals Design of bifunctional quaternary phosphonium salt catalysts for CO2 fixation reaction with epoxides under mild conditions

2016 ◽  
Vol 18 (17) ◽  
pp. 4611-4615 ◽  
Author(s):  
Shiyao Liu ◽  
Naoki Suematsu ◽  
Keiji Maruoka ◽  
Seiji Shirakawa
Keyword(s):  
Co2 Fixation ◽  
Phosphonium Salt ◽  
Cyclic Carbonates ◽  
Efficient Synthesis ◽  
Reaction Conditions ◽  
Mild Conditions ◽  
Phosphonium Iodide ◽  
Fixation Reaction ◽  
Quaternary Phosphonium Salt

An efficient synthesis of cyclic carbonates from epoxides and CO2 under mild reaction conditions was achieved via the use of a designed bifunctional quaternary phosphonium iodide catalyst.

scholarly journals Intermolecular Rhodium-Catalysed Hydroamination of Non-Activated Olefins: Effect of Olefin, Amine, Phosphine and Phosphonium Salt

ChemPlusChem ◽  
2012 ◽  
Vol 77 (6) ◽  
pp. 445-454 ◽  
Author(s):  
Mireia Rodriguez-Zubiri ◽  
Christine Baudequin ◽  
Aurélien Béthegnies ◽  
Jean-Jacques Brunet
Keyword(s):  
Phosphonium Salt ◽  
Activated Olefins

Evaluation of quaternary phosphonium salt as the collector in bauxite reverse flotation

2017 ◽  
Vol 5 (5) ◽  
pp. 4494-4496 ◽  
Author(s):  
Jihua Zhai ◽  
Pan Chen ◽  
Wei Sun ◽  
Yuehua Hu ◽  
Tong Yue ◽  
...  
Keyword(s):  
Phosphonium Salt ◽  
Reverse Flotation ◽  
Quaternary Phosphonium Salt

Pyrrolidide formation as a side reaction during activation of carboxylic acids by phosphonium salt coupling reagents

1999 ◽  
Vol 6 (4) ◽  
pp. 243-245 ◽  
Author(s):  
Jordi Alsina ◽  
George Barany ◽  
Fernando Albericio ◽  
Steven A. Kates
Keyword(s):  
Carboxylic Acids ◽  
Phosphonium Salt ◽  
Side Reaction ◽  
Coupling Reagents
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