PPT-Synthesis of Heterocyclic Rings

5 carbenes and nitrenes Carbenes are uncharged electron deficient molecular species that contain a divalent carbon atom surrounded by a sextet of electrons Generally there are two types of . (Diels-Alder . Cycloaddition. Reactions). Hetero-Diels-Alder Reactions. Reaction between . cyclopentadiene. and diethyl . azodicarboxylate. Normal Diels-Alder Reaction. Inverse electron demand Diels-Alder Reaction. 7 . (. Cycloaddition. . Reactions. ). A . cycloaddition.  is a . pericyclic.  . chemical reaction. , in which "two or more unsaturated molecules (or parts of the same molecule) combine with the formation of a cyclic adduct in which there is a net reduction of the bond multiplicity.". Rings . Pyridne. , . quinoline. and . isoquinoline. Pyridne. Pyridine is a water -miscible liquid, b. p. 115 . oC. with . an unpleasant . odour. An . Excelent. polar . solvent, A . base (. Dynemicin. A. Andrew G. Myers. 140 publications to date. (1981) B.S. at MIT – undergraduate research with W. R. Roush.. (1981-86) Graduate studies and brief post-doctoral work under E.J. Corey.. (1986) Began independent career – California Institute of Technology. Heterocyclic. Chemistry. Heterocyclic. Chemistry. Five-. membered. . Heterocycles. Pyrrole. , Furan and . Thiophene. Heterocyclic Chemistry. Five Membered Heterocycles-Introduction. The main reason for the study of pyrrole came from the work on the structure of haem; the blood respiratory pigment, and the chlorophyll; the green photosynthetic pigment of plants.. NOMENCLATURE & RING SYNTHESIS. NOMENCLATURE OF HETEROCYCLIC COMPOUNDS. DEFINITION:. A cyclic organic compound containing all carbon atoms in ring formation is referred to as a carbocyclic compound.. Dr. Sheppard, CHEM 4201, Fall 2014. Heterocyclic Chemistry. The chemistry of . heterocycles. Formation. Reactions. Applications. Several examples already seen this semester. Atom Identification. Numbers. A heterocyclic amine is a cyclic organic compound that consists of a ring of five or six atoms, of which one or two are nitrogen atoms.. The aroma of pepper is due to . piperidine. , a heterocyclic amine. A. Andrew G. Myers. 140 publications to date. (1981) B.S. at MIT – undergraduate research with W. R. Roush.. (1981-86) Graduate studies and brief post-doctoral work under E.J. Corey.. (1986) Began independent career – California Institute of Technology. Alkaloids and Heterocyclic Compounds.. . Alkaloids. Alkaloids are a class of basic and cyclic organic compounds, naturally occurring consist of carbon, hydrogen mainly, and nitrogen and usually oxygen. . 3. rd. Year Students. Special . Chem. , . Chem-Phys. , Geo-. chem. , Zoo-. Chem. , . Bot-. Chem. Prof. . Ahmed El . Kady. , Prof. . Fatehia. . Korany. , Dr. Adel Abdel . Gawad. , Dr. . Asmaa. . Mouorad. Chemistry. Heterocyclic. Chemistry. Five-. membered. . Heterocycles. Pyrrole. , Furan and . Thiophene. Heterocyclic Chemistry. Five Membered Heterocycles-Introduction. The main reason for the study of pyrrole came from the work on the structure of haem; the blood respiratory pigment, and the chlorophyll; the green photosynthetic pigment of plants.. Hetrocyclic. Compounds. Lecture six:. عضوية . Alkaloids and Heterocyclic Compounds. Alkaloids :-. Alkaloids are a group of naturally occurring chemical compounds that mostly contain nitrogen atom in the heterocycles and originate from amino acids. This group also includes some related compounds with neutral, and even weakly acidic properties. . by N‑Heterocyclic . Carbenes. 2015-12-01. Reporter: . Pengfei. Yuan. Supervisor: Prof. Yong . Huang. 2. Introduction . of N-Heterocyclic . Carbenes. Umpolung. . Acylazolium. . Catalysis. Lewis Base .