THE CONVERSION OF STYRENE OXIDE ENANTIOMERS INTO SPECTROSCOPICALLY DISTINGUISHABLE DIASTEREOMERS THROUGH COMPLEXATION WITH 3,3,3-TRIFLUORO-1,2-EPOXYPROPANE

2019 ◽  
Author(s):  
Mark Marshall ◽  
Anna Krin ◽  
Sergio Domingos ◽  
Melanie Schnell ◽  
Helen Leung
Keyword(s):  
Styrene Oxide

Model reactions for the study of hydrogenation and acidic activity of palladium catalysts

1987 ◽  
Vol 52 (8) ◽  
pp. 2019-2027 ◽  
Author(s):  
Libor Červený ◽  
Nguyen Thi Du ◽  
Ivo Paseka
Keyword(s):  
Palladium Catalysts ◽  
Styrene Oxide ◽  
Side Reactions ◽  
Pd Catalysts ◽  
Variable Parameters ◽  
Acid Properties ◽  
Liquid Phase Hydrogenation ◽  
Acid Catalysed Reactions ◽  
Different Content ◽  
Model Reactions

Palladium catalysts have been used to study the hydrogenation of 1-phenyl-2-butene-1-ol which is accompanied by several side reactions considered to be acid-catalysed. Another model reaction studied was dehydration and subsequent hydrogenation or hydrogenolysis of 1-phenyl-1,3-propanediol to 3-phenyl-1-propanol, accompanied by formation of propylbenzene. The dehydration and propylbenzene formation can be again classified as acid-catalysed reactions. Another one is methanolysis of styrene oxide taking place under conditions of liquid phase hydrogenation due to the acid properties of Pd-H systems. Hydrogenation activity of Pd catalysts was tested by hydrogenation of cyclohexene. Sixteen Pd catalysts on different supports and with different content of active component were used, their activity and selectivity was determined and the effect of variable parameters in the synthesis of these catalysts on the activity and selectivity is discussed.

Lithiated three-membered heterocycles as chiral nucleophiles in the enantioselective synthesis of 1-oxaspiro[2,3]hexanes

2021 ◽  
Author(s):  
Andrea Cocco ◽  
Maria Grazia Rubanu ◽  
Maria Laura Sechi ◽  
Angelo Frongia ◽  
Pietro Mastrorilli ◽  
...  
Keyword(s):  
Styrene Oxide ◽  
Enantioselective Synthesis ◽  
High Yields

Enantiomerically enriched oxaspiro- and azaspirohexanes were synthesized through a two-step addition of configurably stable Li-styrene oxide (or aziridine) to 3-substituted cyclobutanones and base-mediated Payne rearrangement sequence with high yields and selectivity.

Structures and mechanisms of CO2 cycloaddition with styrene oxide on bimetallic M–Cu–BTC MOFs (M = Mg, Ca, Al, and Ga): a DFT study

2021 ◽  
Author(s):  
Jakkapan Sirijaraensre
Keyword(s):  
Styrene Oxide ◽  
Cyclic Carbonate ◽  
Dft Study

The Al–Cu–BTC catalyst having the strongest interaction with the SO molecule is the most promising catalyst for the conversion of CO2 to cyclic carbonate.

Type-A dipole moment and segmental dynamics of poly(styrene oxide)

Polymer ◽  
2005 ◽  
Vol 46 (6) ◽  
pp. 1913-1920 ◽  
Author(s):  
Yuji Hirose ◽  
Keiichiro Adachi
Keyword(s):  
Dipole Moment ◽  
Styrene Oxide ◽  
Type A ◽  
Segmental Dynamics

Highly selective synthesis of styrene oxide over phosphotungstic acid supported on mesoporous Mn-MCM-41 molecular sieves

2009 ◽  
Vol 17 (1) ◽  
pp. 57-68 ◽  
Author(s):  
GuangQing Liu ◽  
GuangJian Wang ◽  
ZhenXing Yang ◽  
YiWu Liu ◽  
MingXia Xu ◽  
...  
Keyword(s):  
Molecular Sieves ◽  
Phosphotungstic Acid ◽  
Styrene Oxide ◽  
Selective Synthesis ◽  
Mcm 41

Activation of styrene to styrene oxide in hepatocytes and subcellular fractions of rat liver

1984 ◽  
Vol 23 (2) ◽  
pp. 157-162 ◽  
Author(s):  
G. Belvedere ◽  
E. Elovaara ◽  
H. Vainio
Keyword(s):  
Rat Liver ◽  
Styrene Oxide ◽  
Subcellular Fractions

Synthesis of styrene carbonate from styrene oxide and CO 2 over ZnBr 2 supported on MCM-41—Coated magnetic Fe 3 O 4

2016 ◽  
Vol 14 ◽  
pp. 23-30 ◽  
Author(s):  
Shanshan Luo ◽  
Guozhi Fan ◽  
Ming Luo ◽  
Jianfen Li ◽  
Guangsen Song
Keyword(s):  
Styrene Oxide ◽  
Styrene Carbonate ◽  
Mcm 41

scholarly journals Discovery of a Novel Styrene Monooxygenase Originating from the Metagenome

2007 ◽  
Vol 73 (18) ◽  
pp. 5832-5839 ◽  
Author(s):  
Erik W. van Hellemond ◽  
Dick B. Janssen ◽  
Marco W. Fraaije
Keyword(s):  
Styrene Oxide ◽  
Enantiomeric Excess ◽  
Metagenomic Library ◽  
Blue Pigment ◽  
Sequence Identity ◽  
Small Family ◽  
Genome Sequence Database ◽  
Loam Soil ◽  
Interesting Class ◽  
Styrene Derivatives

ABSTRACT Oxygenases form an interesting class of biocatalysts, as they typically perform oxygenations with exquisite chemo-, regio-, and/or enantioselectivity. It has been observed that, once heterologously expressed in Escherichia coli, some oxygenases are able to form the blue pigment indigo. We have exploited this characteristic to screen a metagenomic library derived from loam soil and identified a novel oxygenase. This oxygenase shows 50% sequence identity with styrene monooxygenases from pseudomonads (StyA). Only a limited number of homologs can be found in the genome sequence database, indicating that this biocatalyst is a member of a relatively small family of bacterial monooxygenases. The newly identified monooxygenase catalyzes the epoxidation of styrene and styrene derivatives and forms the corresponding (S)-epoxides with excellent enantiomeric excess [e.g., (S)-styrene oxide is formed with >99% enantiomeric excess, ee] and therefore is named styrene monooxgenase subunit A (SmoA). SmoA shows high enantioselectivity towards aromatic sulfides [e.g., (R)-ethyl phenyl sulfoxide is formed with 92% ee]. This excellent enantioselectivity in combination with the moderate sequence identity forms a clear indication that SmoA from a metagenomic origin represents a new enzyme within the small family of styrene monooxygenases.

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