Sökning: "total synthesis"

Visar resultat 6 - 10 av 288 avhandlingar innehållade orden total synthesis.

1. 6. Synthesis of Indole Alkaloids and Development of New Methodology

   Författare :Anita Hoang; Centrum för analys och syntes; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; total synthesis; indole alkaloids; Domino reactions; vicinal quaternary stereocenters; quaternary stereocenter; indoline synthesis; communesin alkaloid; perophoramidine; dehaloperophoramidine; akuammiline alkaloids; strictamine; intramolecular Heck reaction; domino carbopalladation carbonylation; indoline alkaloids;

   Sammanfattning : This thesis describes our efforts towards the total synthesis of natural products and the development of a newmethodology to afford a synthetically important scaffold.Chapter 2 outlines our efforts towards the total synthesis of a marine natural product, perophoramidine as wellas our completed synthesis of dehaloperophoramidine. LÄS MER

3. 7. Synthesis gas from black liquor : trace components and methanol synthesis

   Författare :Caroline Häggström; Mats Lindblom; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Chemical Technology; Kemisk teknologi;

   Sammanfattning : The common European Energy and Climate policy states that in 2020 the share of biofuels for inland transports should be 10 %. Such a stipulation calls for a commercially sustainable biofuel production. LÄS MER

4. 8. Development of an Asymmetric Synthesis of Glionitrin A and B

   Författare :Niels Koning; Centrum för analys och syntes; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; total synthesis; glionitrin; natural products; asymmetric synthesis; organocatalysis; C-H activation; epidithiodiketopiperazine; sulfenylation;

   Sammanfattning : In this thesis, studies in the chemical synthesis of the dithiodiketopiperazine natural products (—)-glionitrin A and B are described.In Chapter 2, a synthesis of the indoline-fused 2,5-diketopiperazine core of glionitrin A and B using a C-H activation approach is described. LÄS MER

5. 9. Terpenoid Conidiation Factors in Penicillium cyclopium

   Författare :Yanhong He; Centrum för analys och syntes; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; acetals; hydrolysis; Biotechnology; Bioteknik; total synthesis; analogues; synthesis; conidiogenone; conidiogenol; terpenoid; Penicillium cyclopium; conidiation inducing activity; Natural product; fungal metabolites;

   Sammanfattning : Filamentous fungi produce asexual dispersive spores (conidia), when conditions are not suitable for apical extension growth. Conidiation (the process by which conidia produced) in genus Penicillium has attracted considerable interest because of its wide usage in different areas. LÄS MER

7. 10. Natural products from nonracemie building blocks : synthesis of pine sawfly pheromones

   Författare :Michael Larsson; Torbjörn Norin; Gunnar Westman; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Organic chemistry; Total synthesis; diastereoselective addition; dimethylzinc; Lewis acid; alkyllithium; Organisk kemi; Organic chemistry; Organisk kemi;

   Sammanfattning : This thesis describes a number of synthetic approaches for obtaining chiral, enantiomerically pure natural products, in particular some semiochemicals. This has been accomplished by using various strategies; by starting from compounds from the chiral pool, by using chiral auxiliaries, via enzymatic resolutions or by chemical asymmetric synthesis. LÄS MER