'Aldol' diaporamas de présentation

Chapter 20 Enols and Enolates

Chapter 20 Enols and Enolates. Aldehyde , Ketone , and Ester Enolates. O. CH 3 CH 2 CH 2 CH. Terminology. The reference atom is the carbonyl carbon. Other carbons are designated ? , ? , ? , etc. on the basis of their position with respect to the carbonyl carbon.

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Biochemical Examples of CHEM321/322 Concepts

Biochemical Examples of CHEM321/322 Concepts. Stereochemistry. Many biomolecules, including proteins, carbohydrates and DNA, are chiral.

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Chapter 23. Carbonyl Condensation Reactions

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Chapter 18 Enols and Enolates

Chapter 18 Enols and Enolates. 18.1 The ? -Carbon Atom and its pK a. O. CH 3 CH 2 CH 2 CH. Terminology. The reference atom is the carbonyl carbon. Other carbons are designated ? , ? , ? , etc . on the basis of their position with respect to the carbonyl carbon.

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Organic Chemistry II Alpha Substitution Reactions

Organic Chemistry II Alpha Substitution Reactions. Dr. Ralph C. Gatrone Department of Chemistry and Physics Virginia State University. The ? Position. The carbon next to the carbonyl group is designated as being in the ? position. Objectives. Keto-enol tautomerism

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Chapter 19

Chapter 19. Condensation and Conjugate Addition Reactions of Carbonyl Compounds More Chemistry of Enolates. About The Authors. These PowerPoint Lecture Slides were created and prepared by Professor William Tam and his wife, Dr. Phillis Chang.

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Chapter 19

Chapter 19. Condensation and Conjugate Addition Reactions of Carbonyl Compounds More Chemistry of Enolates. https://www.concursolutions.com. Introduction. Carbonyl condensation reactions. Claisen condensation:. An a carbon anion (enolate) from one ester attacks the

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Chapter 19 Enolates and Enamines

Chapter 19 Enolates and Enamines. Formation of an Enolate Anion. Enolate anions are formed by treating an aldehyde, ketone, or ester, which has at least one a -hydrogen, with base, Most of the negative charge in an enolate anion is on oxygen. oxygen. Reactive carbon. Enolate Anions.

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Asymmetric Frontiers in Lanthanide Catalysis

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Chapter 23. Carbonyl Condensation Reactions

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Chapter 17 Aldehydes and Ketones II. Aldol Reactions

Chapter 17 Aldehydes and Ketones II. Aldol Reactions. The Acidity of the a Hydrogens of Carbonyl Compounds: Enolate Anions Hydrogens on carbons a to carbonyls are unusually acidic The resulting anion is stabilized by resonance to the carbonyl.

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the aldol and Claisen condensations

Aldol and Claisen condensations. REACTION OF CARBON NUCLEOPHILES WITH CARBONYL GROUPS. some of the most useful synthetic methods for carbon-carbon bond formation. Robinson annulation. Wittig and related olefination reactions. REACTIONS OF CARBON NUCLEOPHILES WITH CARBONYL GROUPS.

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Asymmetric Catalytic Aldol

Asymmetric Catalytic Aldol. Special Topic 27/04/2007 Hazel Turner. Contents. The Aldol Reaction The Directed Aldol Chiral Auxiliaries Examples Mukaiyama Aldol Acceptor activation Titanium Zirconium Copper Boron Donor Activation Rhodium, Palladium, Phosporamides

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Ch. 18 Lect. 2 Complex Carbonyl Reactions

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