Sökning: "HWE-reaction"

Hittade 2 avhandlingar innehållade ordet HWE-reaction.

1. 1. Synthesis of aromatic bis- and tris(amino acids) and chiral dendrimers

   Författare :Andreas Ritzén; Centrum för analys och syntes; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Organisk kemi; Organic chemistry; HWE reaction; asymmetric hydrogenation; Heck reaction; Amino acids; chiral dendrimers;

   Sammanfattning : A number of protected aromatic bis- and tris(amino acids) have been synthesised by catalytic asymmetric hydrogenation of the corresponding didehydroamino acid derivatives. The didehydroamino acid derivatives were prepared either by a Heck coupling of a 2-amidoacrylate with an aryl dihalide, or by Horner-Wadsworth-Emmons olefination of aromatic aldehydes with phosphonylglycine reagents. LÄS MER

3. 2. Synthetic studies of marine indole alkaloids and related systems

   Författare :Ann-Louise Jonsson; Karolinska Institutet; Karolinska Institutet; []
   Nyckelord :Marine indole alkaloids; antifouling; synthesis; diketopiperazines; HWE-reaction; bis indole alkaloids; imidates; carbazole alkaloids;

   Sammanfattning : This thesis is mainly focussed oil the synthesis of marine indole alkaloids and related systems, many of which display interesting biological activities. In the first part of this thesis we could establish and confirm the stucture of barettin and 8,9dihydrobarettin, isolated from the marine sponge Geodia baretti. LÄS MER