Search for dissertations about: "Ammonium ylide"

Found 3 swedish dissertations containing the words Ammonium ylide.

  2. 1. Asymmetric [2,3]-Sigmatropic Rearrangement of Allylic Ammonium Ylides

    Author : Jan Blid; Peter Somfai; James C. Anderson; KTH; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; asymmetric; [2; 3]-sigmatropic rearrangement; allylic amine; ammonium ylide; Lewis acid; enantioselective; boron; phosphazene base; NMR spectroscopy; DFT-calculations; Organic chemistry; Organisk kemi;

    Abstract : The thesis describes the realization of an asymmetric [2,3]-sigmatropic rearrangement of achiral allylic amines. It is divided into two parts; the first part deals with the development of a Lewis acid-mediated [2,3]-sigmatropic rearrangement and the second the asymmetric version thereof. READ MORE

  4. 2. Lewis Acid Mediated [2,3]-Sigmatropic Rearrangement of Allylic Ammonium Ylides

    Author : Jan Blid; KTH; []
    Keywords : Sigmatropic rearrangement; Lewis acid; Ammonium ylide; NMR spectroscopy; Density functional calculations;

    Abstract : This thesis describes a Lewis acid mediated[2,3]-sigmatropic rearrangement of various allylic ammoniumylides. Several Lewis acids are investigated and BBr3 and BF3are established to be the Lewis acids providing the highestconversion of the starting allylic amines. READ MORE

  5. 3. Development of New Methodology in Organic Synthesis: Lewis Acid-Mediated Rearrangements of Ammonium Ylides and Addition of 1, 3-bis(silyl) propenes to Aldehydes

    Author : Pavel Tuzina; Peter Somfai; Ari Koskinen; KTH; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; asymmetric; amino acid; ammonium ylide; Lewis acid; microwave irradiation; Organic synthesis; Organisk syntes;

    Abstract : This thesis deals with the development of new methodologies in organicsynthesis. The main focus is on the development of Lewis acid-mediated [1,2]-rearrangements of ammonium ylides and the novel addition of 1,3-bis(silyl)propenes to carbonyl compounds. READ MORE