Pyrrole PowerPoint PPT Presentations

Synthesis of Pyrroles and Indoles. Carbonyl condensations (c.f. chapt. 3) - Pyrroles ... Not useful for indoles. Strategy b; Knorr synth. Strategy a and b ...

Electrophilic substitution in pyrrole, furan and thiophene X = O, NH, or S Examples: Furan is able to act as a diene in the reactions of cycloaddition The Fisher ...

... 3 methylthiole Pyrrole Azole 2 Bromo pyrrole 2 Bromo azole Pyrazole 1,2-diazole 5 methylpyrazole 5 methyl(1,2-diazole) imidazole 1,3 ...

... ~50%; Pyridine/Pyrrole: ~10% http://cbc.arizona.edu/njardarson/group/top-pharmaceuticals-poster Overview of My Group Why Cycloadditon?

V po et konstant hyperjemn ho t pen -proton v EPR spektrech substituovan ch kationradik l pyrrolu Petr Holub

... Protoporphyrin IX Glycine + Succinyl CoA the pyrrole ring is formed The Adler synthesis of simple, symmetrically substituted porphyrins: Meso position ...

The nitrogen atoms in molecules of both pyridine and pyrrole are sp2 hybridized. 13.17 The orbital structures of furan and thiophene 13.13 Aromatic compounds in ...

tautomerism. pyridine. Resemblance of benzene: FURANE PYRROLE THIOPHENE. C O N S. EN: 2.5 3.5 3.0 2.4 ... Pyrrole - metalloporphyrines (heme, hemine, ...

PORPHYRIN METABOLISM dr Agus Budiman L. Porphyrins are cyclic compounds formed by the linkage of four pyrrole rings through methenyl bridges. Characteristic property ...

Much more stable under acidic conditions than pyrroles ... Reat with radicals. Seldom synthetically usefull. Cycloadditions. Easier with furan. Oxythiophenes ...

The word indoles derived from the word India blue dye. ... The pyrrole ring in the indoles readily undergo subistitution reactions .The ...

Polycyclic aromatic hydrocarbons 2. Basicity and acidity of the nitrogen heterocycles 3. Chemistry of pyrrole, furan, and thiophene 4. Chemistry of pyridine 2.

Brief Summary: Pyridine & Pyrrole: Acid/base chemistry. D/A properties H-bonding (non-specific) ... Reactions of pyridine (N as a nucleophile) Sugars. Fischer ...

The objective was expanded to include the preparation of pyrrole a-sulfonamides. ... Pyrrole Amides and Their Use as Building Blocks. for the Preparation of ...

planar (like benzene) N has lone pair in both pyridine & pyrrole basic (H acceptor or e- donor) ... a H-bond acceptor e.g. benzene is insoluble in H2O but ...

Highly unsaturated (r db = 4), yet Br2 or HBr does not add across multiple ... Reacts with Br2 in presence of FeBr3 catalyst by ... pyridine pyrrole imidazole ...

HOMO: on donor moiety and on. porphyrin N and meso atoms. LUMO: on acceptor moiety and. porphyrin pyrrole C atom and. meso C atom to which donor and ...

amides and pyrroles of the 2 molecules. 5 ... Amide bond formed. 8. Synthesis of Distamycin III. amidinium. nitrile. 9. Synthesis of Distamycin IV ...

Title: Slide 1 Author: Heather Hertema Last modified by: Heather Hertema Created Date: 1/9/2006 7:24:13 PM Document presentation format: On-screen Show

The nitrogen withdraws electrons by resonance, resulting in an electron-deficient ring system. * Pyridine undergoes electrophilic aromatic substitution at C-3: ...

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Thiophene 1 1,4 dicarbonyl compound with a source of sulphur lec5 2 The Hinsberg Synthesis The consecutive aldol condensation between 1,2 ...

Benzene and Aromaticity Bonding in Benzene Proposed Benzene Structures C6H6 reacts with HBr to form one isomer of C6H5Br Other Conjugated Hydrocarbon Rings Annulenes ...

Cyclic and heterocyclic aromatic compounds Chapter 25 * * Outline 1. Polycyclic aromatic hydrocarbons 2.

Theories exist that the original myth of vampires stemmed from porphyria ... Vampires: sensitivity to light, red teeth and eyes ...

Title: PowerPoint Presentation Last modified by: plamen peikov Created Date: 1/1/1601 12:00:00 AM Document presentation format: Overhead Other titles

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5 6 5 1 2 3 4 5 furan 1 2 ...

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... Isocyanide 42 Proposed Mechanism Functionalization of the Pre-formed Indole System Heck Cross-Coupling Reaction Sonogashira Cross-Coupling Reaction 43 ...

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SYNTHESIS OF AROMATIC HETEROCYCLES. CONSTRUCTION OF THE RING SKELETON ... 1,3-dipol. Cycloaddition with ortho-Quinodimethanes. Electrocyclic. ring opening ...

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Chapter 15 Benzene and Aromaticity Aromatic was used to described some fragrant compounds in early 19th century Not correct: later they are grouped by chemical ...

2. Basicity and acidity of the nitrogen heterocycles ... The Fisher synthesis of indoles. 4. Chemistry of pyridine. Electrophilic substitution in pyridine ...

Pyridine Is Aromatic Electrophilic Substitution Reactions Halogenation (Br, Cl, I) Nitration (NO2) Sulfonation (SO3H) Friedel-Crafts acylation Friedel-Crafts ...

1,3-AZOLES. Reactivity towards E-files. Reaction with ... Mechanism taxol. Pilokarpin (Acetylkolin agonist) Glaukom. Isolert fra Pilocarpus jaborandi ...

(Chemical Crystallography Laboratory, Dept. Chemistry, University of Oxford) Crystallography Group in the OCD 1954. Left to right, standing: J.H. Robertson, M ...

... their aromatic carbo cyclic analogues for example pyridine (III) and benzene (IV) ... usual strong reagent but the pyridine sulphur trioxide compound under mild ...

BIOCHEMISTRY

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Soubor prezentac : CHEMIE PRO III. RO N K GYMN ZIA CH39 - Heterocyklick slou eniny Mgr. Ale Chup , RNDr. Yvona Pufferov Gymn zium, Hav ov-M sto ...

6-membered rings - electron deficient - reactive in Nu-fil. Ar subst. 2 / 4 Pos. ... Metal - Halogen Exchange. R-Li: Alkyllithium, NOT LDA etc. ...

DoM Reactivity of Indoles. N-DMG = CO2t-Bu. Indirect C-7 Substitution ... DoM Reactivity of Non-N DMG Indoles. DMG = OCONEt2. Benzenoid Ring Functionalization ...

alkaloids

Title: Biochemistry: A Short Course Author: Tymoczko, Berg, Stryer Last modified by: J. E. Pinto Created Date: 12/24/2002 1:08:46 AM Document presentation format

... (isoquinoline) (benzopyran) - - (benzo- -pyrone) (purine) p

1) Benzene is last in the name. 2) List substituents alphabetically. Number ring in direction that gives lowest. locant at first point of difference ...

Sulfur also intimately involved in biological processes ... Sulfoxides and Sulfones CH3S(O)CH2CH3 methyl ethyl sulfoxide. CH3S(O2)CH2CH3 methyl ethyl sulfone ...