Stereoselective PowerPoint PPT Presentations

Stereoselective bionano-catalysis on gold nanoparticles Ryszard Ostaszewski Institute of Organic Chemistry, PAS, Kasprzaka 44/52, Warsaw, Poland

Stereoselective Oxidation and Reduction Reactions Dr Simon Woodward School of Chemistry, University of Nottingham

approach is to less hindered (bottom) face of carbonyl group ... pyruvic acid S-( )-lactic acid. O. CH3CCO2H. NADH. H enzyme is lactate dehydrogenase ...

Main hurdles for synthesis Stereoselective introduction of the side chain at C17 with the proper stereochemistry at C24 Accommodation of the acetoxyl group on C16 in ...

Asymmetric Enantioselective Ireland-Claisen Rearrangement using a Chiral Boron Reagent ... of the intermediate boron enolate: E/E educts afford the threo (syn) ...

CHM443. Stereocatalysis. Opposite stereoselectivity in the ... Item Value Threshold Converged? Maximum Force .000246 .000450 YES. RMS Force .000083 .000300 YES ...

Interest in polyketide macrolide-derived natural products with the skipped ... Srivastava Dr. Jyoti Nandy Dr. Ravi Naga Prasad Dr. Deogratias Ntirampebura ...

Carbonyl and Azomethine Electrophiles. Carbonyl and Azomethine ... 4 Versus 6 Center Transition States for Boron. Stereoselective Reductions: Cyclic Systems ...

Biomimetic Steroid Hydroxylation Regioselective for C-6 Stereoselective for the face. 10 equivalents of PhI=O oxidant and pyridine Reaction in water ...

Heats of Hydrogenation of Isomers. Ethylene 136. Monosubstituted 125-126 ... most stable isomer. Problem 6.2. 6.3. Stereochemistry of Alkene Hydrogenation ...

Title: Carey Chapter 6 Alkene Addition Author: Monte Wolf Last modified by: MWolf Created Date: 3/21/2000 5:46:08 PM Document presentation format

explaining diels alder reactions

Chiral hydroxy- and amino- phosphonic acids. Synthesis of carbohydrate mimics ... Passerini reaction. Rigid scaffolds via Ugi reaction. Ugi reaction's ...

OPTION CHV - Green Chemistry Objectives Teaching modules Get competences in advanced organic synthesis and in catalysis while extending the knowledge of technologies ...

Step 2: the alkenyl radical anion (a very strong base) abstracts a proton from ... a trans alkenyl anion is more stable than its cis isomer ...

GROUP III HYDRIDE-DONOR REAGENTS Reduction of carbonyl compounds Most reductions of carbonyl compounds are done with reagents that transfer a hydride from boron or ...

Title: OC 2/e Ch 10 Alkynes Subject: Alkynes Author: Bill Brown Last modified by: Bill Brown Created Date: 7/18/1997 11:31:07 AM Document presentation format

Title: Exploring Nature s total synthesis machinery Author: Greg Challis Last modified by: Challis Created Date: 11/13/2001 11:16:53 AM Document presentation format

Title: Author: elks Last modified by: Seungho Lee Created Date: 10/6/1999 7:17:26 AM Document presentation format:

Alkenes Addition Reactions Synthesis BH3 adds to Alkene Hydroboration Regiochemistry is Anti-Markovnikov Syn Addition of H2O Draw the Major Products 2 ...

Carbohydrates (McM chapt 25) Glucose: C6H12O6 = 'C6(H2O)6' ... Benedict [old diabetes (glucose) test] Tests (visual results) Not used in synthesis ...

Substitution and Elimination Reaction of Alkyl Halides By: Ismiyarto, MSi * 4 18 18 9 9 21 21 2 4 6 6 8 11 6 2 6 26 29 32 H C C A B X Y H H H syn-Addition; Metal ...

Alkenes react with many electrophiles to give useful products by addition (often ... More stable carbocation is consistent with steric preferences. 18 ...

Synthesis Biosynthesis Reagents = small carbon-based molecules (e.g. amino acids, carbohydrates) Catalysts = enzymes, proteins that bind and then catalyze chemical ...

Anti viral and anti tumor ... Palladium/Lewis Acid Mediated Ring Opening Of Bicyclic. Hydrazines Towards The Synthesis Of Cyclopentene Derivatives ...

Chapter 5 The Arrangement of Atoms in Space; The Stereochemistry of Addition Reactions Contents of Chapter 5 Conformational and Configurational Isomers Chirality ...

Stereochemistry Chapter 6 Is the ... Tamiflu: a drug for influenza Transition state for action of influenza neuraminidase N-acetyl neuraminic acid O-sugar ...

Hydrophobic channels - Perfect Models for Membrane Water Channels. A balance between the size and hydrophobicity. Carbon Nanotubes ...

Application of radical conjugate addition reactions in Total Synthesis ... Diastereoselectivity is often a result of steric hindrance ...

Aptamer is a term derived from the Latin aptus - fit, and the Greek meros – part. Aptamers are oligonucleic acid or peptide molecules that bind to a specific target molecule. By selecting from a large random sequence pool, we usually can get aptamers, but natural aptamers also are found in riboswitches. To narrow down, aptamers can be classified as: DNA or RNA or XNA aptamers. They consist of (usually short) strands of oligonucleotides. Peptide aptamers. They consist of a short variable peptide domain, attached at both ends to a protein scaffold.

... Lone Pair on Bromine Stabalizes Carbocation and Forms Cyclic Bromonium Ion Step 2; Bromide Ion Must Attack from Oppositte Side of Cyclic Bromonium Ion ...

William H. Brown Christopher S. Foote Brent L. Iverson Nomenclature IUPAC: use the infix -yn- to show the presence of a carbon-carbon triple bond Common names: prefix ...

Title: Cholinergic Drugs Author: Eric Barker Last modified by: ericb Created Date: 6/17/1995 11:31:02 PM Document presentation format: On-screen Show

guided-inquiry projects and experiments christina noring hammond vassar college poughkeepsie, ny

... 96. 1. Ergot alkaloids as novel chiral selectors in CE. Benno A. Ingelse, Jetse ... Allyl-terguride has great potential as a chiral selector for organic acids ...

Title: No Slide Title Author: Youngstown State University Last modified by: Peter Norris Created Date: 8/30/2000 5:06:32 PM Document presentation format

www.ch.ic.ac.uk/marshall/4I-11.html & WebCT. 4I-11 - Lectures ... atactic PLA. n/a. n/a. 49. amorphous. heterotactic PLA. n/a. n/a. 45. 153. syndiotactic PLA ...

Title: OC 2/e 6 Subject: Alkenes II Author: Bill Brown Description: Same format as Alkenes I Last modified by: Bill Brown Created Date: 7/13/1997 8:01:25 AM

... 5.4 5.7 Cycloalkenes - trans not necessarily more stable than cis C-12 cis and trans ~ equal in energy Sterculic acid (natural product) ... Chemistry Other titles:

Metallocene Organometallic coordination compounds in which one atom of a transition metal such as iron, ruthenium or osmium is bonded to and only to the face of two ...

... Enantioselective Aldol Reactions of Ketones and Aldehydes with Aldehydes in Water ... Aldol addition reactions of ketones and aldehydes with aromatic ...

limited to industrial syntheses of ethylene, propene, 1,3 ... fewest hydrogens. R. OH. CH3. C. C. H. R. CH2R. three protons on this b carbon. The Zaitsev Rule ...

Title: Diapositive 1 Author: collinss Last modified by: collinss Created Date: 8/25/2004 6:34:24 PM Document presentation format: Affichage l' cran

The functional group of an ether is an oxygen atom bonded to two carbon atoms ... in ethyl vinyl ether, for example, the ether oxygen is bonded to one sp3 ...

Any object that has a plane or point of symmetry is achiral (not chiral). Chapter 5 ... Topology of Stereoisomers With Two Chiral Centers. Chapter 5. 27 ...

Alkenes, Alkynes

University Studies (4 1 years programme): Chemistry (290 students) ... Chemical Engineering (170 students) ... Rhodia, Europe France, BASF Germany...

D. A. Evans Asymmetric Synthesis From 80 s Chiral Auxiliary to 90 s Copper Complexes and Their Applications in Total Synthesis Supervisor: Professor Yang Zhen

4I-11 Case studies in Inorganic Chemistry. Every step is reversible. ... (BDI)Mg(m-OiPr)2] gives atactic PLA. Imperial College. London. The Mg analogue. rac-LA ...

The ability of a biorefinery to achieve market economics will ... codon usage. folding. proteolysis. 3. Gene shuffling. genomic. model assisted ...

regioselective (boron to the less hindered carbon) and syn ... step 1: hydroperoxide ion (a nucleophile) donates a pair of electrons to boron (an electrophile) ...

Chapter 15 Pericyclic Reactions ( ) (ref: : 17 ) (Wade: Chapter 15-11, 12 ) Three Pericyclic Reactions ( ) Electrocyclic ...

B Vitamin analogs & synthetic methods. Analogs of a B Vitamin (Nicotinamide Riboside) ... Sirtuins are the apparent target of resveratrol ...

Nu dus een paar dia's.... Rhizomucor miehei lipase in the closed form: ... Metal-dependent (Zn2 cofactor) Aldolases from (hyper)thermophilic microorganisms ...

Facts (1) Dehydrohalogenation of alkyl halides exhibits ... rate: RI RBr RCl RF. implies that carbon-halogen bond breaks in the rate-determining step ...

Isolated from sponge in trace amounts. Likely from symbiotic bacteria on sponge ... Pacific marine sponge Cacospongia mycofijiensis. monensin ...