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35 matches found for epoxidations

Shi Catalyst Asymmetric Epoxidation

• • Download PDF • Catalytic asymmetric epoxidation of alkenes has been the focus of many research efforts over the past two decades, the best known methods probably being those developed by Sharpless1 and Jacobsen-Katsuki.2 Shi has also developed a very efficient method for asymmetric epoxidation, ...

Microreactor Technology

• • Download PDF • Matthias Junkers Product Manager Within the past two decades, Microreactor Technology (MRT) has evolved from a highly advanced toy for chemical engineers to a versatile tool for chemical synthesis. Since the time of the founders of synthetic chemistry, like Justus von Liebig or Fr...

Astec Chiral Chromatography Bibliography by Subject

Amino Acids, Peptides, Biomolecules Chemical, Environmental, Petrochemical Chiral LC-MS Food, Beverage, Natural Products Mechanistic Studies Pharmaceutical, Clinical Preparative, SFC, SMB Daniel W. Armstrong Publications Copyright restrictions do not permit us to provide copies of the articles liste...

MIDA Boronates

The Suzuki-Miyaura cross-coupling reaction of boronic acids is one of the most important and highly utilized reactions in the organic chemistry toolbox, with applications in polymer science as well as in the fine chemicals and pharmaceutical industries. However, many boronic acids are extremely unst...

Salen Ligands

• • Download PDF • Salen molecules have been studied for more than six decades. However, in 1990 Jacobsen and Katsuki independently published the first reports of salen used as ligands with manganese for asymmetric epoxidation reactions.1 Since these first reports, the area of metal-salen catalysis ...

Jørgensen’s Organocatalysts in Chemical Sythesis

Introduction Professor Karl Anker Jørgensen and his group have developed (R)- and (S)-α,α-bis[3,5-bis(trifluoromethyl)phenyl]-2-pyrrolidinemethanol trimethylsilyl ether which serve as excellent chiral organocatalysts in the direct asymmetric α-functionalization of aldehydes.1 In the field of asymmet...

Suzuki Coupling | ChemFiles 2006, 6.2, 10.

• • Download PDF • C–C bond formation via the Suzuki–Miyaura reaction is one of the most powerful and thoroughly explored facets of Pdcatalyzed cross-coupling. The boron-based nucleophiles utilized in this reaction offer distinct advantages over other organometallic coupling reagents. Both boronic a...

Noble-Metal Nanostructures with Controlled Morphologies

• • Download PDF • 1Department of Chemistry and 2Department of Biomedical Engineering, Washington University, St. Louis, MO *Email: xia@biomed.wustl.edu Noble-metal nanostructures are widely used in a variety of applications ranging from catalysis to electronics, surface plasmon resonance (SPR), sur...

Catalytic Asymmetric Epoxidation of Allylic Alcohols

The catalytic asymmetric epoxidation of olefins has become the reaction of choice to generate diverse chiral building blocks used in the synthesis of natural products and biologically active molecules. The development of catalysts based on bis(hydroxamic acid) ligands for the vanadium-catalyzed asym...

epoxide hydrolase 2, cytoplasmic
Synonyms CEH, SEH
Species Human (2053) , Species Mouse (13850) , Species Rat (65030) , Species Zebrafish (494099) , Species dog (477373) , Species cow (511716) , Species domestic cat (101092355) , Species chicken (421999) , Species sheep (101106654) , Species Domestic Rabbit (100350230) , Species domestic guinea pig (100734490) , Species naked mole-rat (101715352)
Summary: This gene encodes a member of the epoxide hydrolase family. The protein, found in both the cytosol and peroxisomes, binds to specific epoxides and converts them to the corresponding dihydrodiols. Mutations in this gene have been associated with familial hypercholesterolemia. Alternatively spliced transcript variants have been described. [provided by RefSeq, Feb 2012]

Shi Epoxidation Diketal Catalyst

Aldrich ChemFiles 2006, 6.10, 11. Catalytic asymmetric epoxidation of alkenes has been the focus of many research efforts over the past two decades, the best known methods probably being those developed by Sharpless1 and Jacobsen-Katsuki.2 Shi has also developed a very efficient method for asymmetri...

BINAP/SEGPHOS® Ligands and Complexes

Aldrich ChemFiles 2008, 8.2, 3. Since the development of BINAP by Noyori 20 years ago, extensive research has been accomplished using this chiral ligand. BINAP proved to be one of the most versatile ligands, catalyzing a wide range of reactions, from hydrogenations to Heck cyclizations.1 The researc...

Keiji Marouka Group – Professor Product Portal

Professor Product Portal Index Professor Keiji Marouka Professor Keiji Maruoka and co-workers have developed a series of designer chiral phase-transfer catalysts that are useful for various asymmetric transformations including asymmetric alkylation, aldol reaction, Mannich reaction, conjugate additi...

Yamamoto Group - Professor Product Portal

Professor Product Portal Index Professor Hisashi Yamamoto The Yamamoto group has employed several applications in catalysis. The list of methodologies include Lewis and Brønsted acid catalysis, chiral Lewis acid catalysis, combined acid catalysis, asymmetric oxidation using V, Zr, Hf catalysts, supe...

Sigma-Aldrich - Chem Product Central

We provide the most comprehensive range of products and enabling technologies for chemical research. To browse our Chemistry Product Lines, simply mouse over your area of interest below. Technology Spotlights • NEW! Electrochemical Allylic C–H Oxidation with N-Hydroxytetrachlorophthalimide (TCNHPI) ...

Asymmetric Synthesis

The catalytic asymmetric epoxidation of olefins has become the reaction of choice to generate diverse chiral building blocks used in the synthesis of natural products and biologically active molecules. The development of catalysts based on bis(hydroxamic acid) ligands for the vanadium-catalyzed asym...

Proline Analogs

Coined by Jacobsen1 as the “simplest enzyme,” L-proline is capable of effecting a variety of catalytic asymmetric transformations. The first examples were reported in the mid-70s, when L-proline was applied to Robinson annulation reactions.2 However, the big potential of proline as an organocatalyst...

CBHA Ligands

Aldrich ChemFiles 2010, 10.1, 5. Yamamoto and his group developed a new type of ligands based on the C2-symmetric chiral bishydroxamic acid (CBHA). These bidentate ligands have pendant "arms" that can be substituted with a variety of substituents allowing for a finetuning of the ligand potency. A va...

Chiral Pyrrolidines

Aldrich ChemFiles 2005, 5.4, 14. Chiral pyrrolidines are playing an important role both as chiral building blocks for auxiliaries as well as key structures relevant to biologically active substances. Sigma-Aldrich has a large selection of pyrrolidines and other heterocyclic building blocks for organ...

Asymmetric Epoxidation of Homoallylic Alcohols

While there are various efficient catalytic systems for the asymmetric epoxidation of allylic alcohols, the extension to homoallylic alcohols had not been demonstrated. While the catalytic system reported above allowed for the desired transformations, the enantioselectivities achieved were a major l...

Synthetic Utility of Vinyl MIDA Boronate

The utility of vinyl MIDA boronate was demonstrated via cyclopropanation and epoxidation to the corresponding MIDA cyclopropane and oxirane, respectively. These procedures (Scheme 13) provided air and chromatography-stable solids in both cases, with the oxirane being the first known synthesis of an ...

Takasago Ligands - Advantages and Applications

Introduction Advantages Representative Applications Product Information Introduction The quest to find chiral catalysts capable of achieving high enantiomeric excess for a variety of asymmetric transformations has been an ongoing endeavor for the past 40 years. One of the most relevant reactions use...

MIDA-protected Boronate Esters

• • Download PDF • Product Manager The Suzuki-Miyaura cross-coupling reaction is one of the most important and highly utilized reactions in organic chemistry, with applications in polymer science as well as in the fine chemicals and pharmaceutical industries. However, some classes of boronic acids a...

Asymmetric Epoxidation Using Shi Catalyst | Technical Article

Aldrich ChemFiles 2008, 8.6, 13. Catalytic asymmetric epoxidation of alkenes has been the focus of many research efforts over the past two decades, the best known methods probably being those developed by Sharpless1 and Jacobsen- Katsuki.2 Shi has also developed a very efficient method for asymmetri...

Benzoylation Reagents for Chemical Synthesis

Simple Tools for α-Oxygenation of Aldehydes and Ketones The α-hydroxycarbonyl moiety is an important structural motif in organic synthesis and is present in a substantial number of natural products. A variety of methods have been developed to prepare this functionality including α-oxygenation of eno...

PhosphonicS™ Heterogeneous Metal Oxidation Catalysts

Aldrich ChemFiles 2010, 10.2, 6. Dr. Josephine Nakhla Dr. Josephine Nakhla Product Manager Email: josephine.nakhla@sial.com Allylic and benzylic oxidations, alcohol oxidations, sulfoxidations, and epoxidations represent key synthetic transformations. Many traditional oxidants (chromium, manganesebas...

MnSO - MOF | Metal-Organic Frameworks (MOF's)

Explore MOF Applications, Properties and Materials to construct MOFs in the MOF Constructor Tool Literature suggests that the following materials can be used to prepare MnSO - MOF. • Linker: H4TCPB (1,2,4,5-Tetrakis(4-carboxyphenyl)benzene) • Metal Source: Zinc Salts (Zn) & Zinc SBU • Metal Source: ...

Astec Chiral Chromatography Bibliography by Phase

Astec Cellulose Astec CHIRALDEX & Supelco DEX Astec CHIROBIOTIC & Macrocyclic Glycopeptides Astec CLC (Copper Ligand Exchange) Astec CYCLOBOND Astec P-CAP and P-CAP-DP Cyclofructans Copyright restrictions do not permit us to provide copies of the articles listed here. ASTEC Cellulose back to top Sup...

Asymmetric Epoxidation Reaction Using MIB

Aldrich ChemFiles 2008, 8.6, 12. Chiral epoxy alcohols are essential building blocks extensively used in the synthesis of natural products. However, the synthesis of these molecules proved to be challenging, especially allylic alcohols containing (E)-olefins. To access a plethora of chiral epoxy alc...

[JIM BALL TEST DOC] MIDA-protected Boronate Esters

Josephine Nakhla Product Manager The Suzuki-Miyaura cross-coupling reaction is one of the most important and highly utilized reactions in organic chemistry, with applications in polymer science as well as in the fine chemicals and pharmaceutical industries. However, some classes of boronic acids are...

Potassium Trifluoroborate Salts

• • Download PDF • Boronic acids, boronate esters, and organoboranes have been utilized for many years as the primary boron source in Suzuki–Miyaura-type reactions. These organoboron reagents have inherent limitations including: 1) boronic acids are often difficult to purify and have uncertain stoic...