Search for dissertations about: "Radical Cyclization"

Showing result 1 - 5 of 8 swedish dissertations containing the words Radical Cyclization.

  2. 1. Construction of Five-Membered Heterocyclic Compounds via Radical Cyclization

    Author : Stefan Berlin; Lars Engman; Mario D. Bachi; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Organic chemistry; radical; cyclization; carbonylation; melatonin; pyrrolidine; pyrrolidin-3-one; tetrahydrofuran-3-one; Organisk kemi; Organic chemistry; Organisk kemi; organisk kemi; Organic Chemistry;

    Abstract : This thesis describes how radical cyclization chemistry can be applied for the construction of heterocyclic compounds.In the first part, a series of electron deficient α-phenylselenenylalkenes were prepared via a PhSeCl-addition/HCl-elimination sequence. READ MORE

  4. 2. Radical Cyclization Approaches to Pyrrolidines

    Author : Magnus Beşev; Troels Skrydstrup; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Organic chemistry; Radical cyclization; diastereselectivity; pyrrolidine; pyrroline; thiazoline; aziridine; Organisk kemi; Organic chemistry; Organisk kemi; organisk kemi; Organic Chemistry;

    Abstract : Five-membered rings are readily prepared by 5-exo-trig radical cyclization. This thesis is concerned with novel methodology for pyrrolidine synthesis. We have synthesised selenium containing radical precursors from aziridines and α-phenylseleno ketones, and cyclized them to 2,4- and 3,4-disubstituted pyrrolidines. READ MORE

  5. 3. Pyrrolidines via Radical Cyclization

    Author : Magnus Besev; Uppsala universitet; []
    Keywords : ;

    Abstract : .... READ MORE

  6. 4. Carbon-Carbon Bond Formation via Radical Cyclization and Transition Metal Catalysis

    Author : Puneet Srivastava; Lars Engman; Ullrich Jahn; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Radical cyclizations; transition metal catalysis; Chemistry; Kemi; Chemistry with specialization in Organic Chemistry; Kemi med inriktning mot organisk kemi;

    Abstract : Free radical cyclization methodology has been used extensively in synthesis for manipulation of complex molecules such as alkaloids, terpenes, carbohydrates, peptides and nucleic acids. The methodology has emerged as a result of work by physical organic chemists who determined rate constants for the most common radical reactions used in organic synthesis. READ MORE

  7. 5. Construction of Five-Membered Heterocycles via Radical Cyclization

    Author : Stefan Berlin; Uppsala universitet; []
    Keywords : ;

    Abstract : .... READ MORE