Dem IPB wird erneut ein beispielhaftes Handeln im Sinne einer chancengleichheitsorientierten Personal- und Organisationspolitik bescheinigt. Das Institut erhält zum 6. Mal in Folge das TOTAL E-QUALITY…
Die Plant Science Student Conference (PSSC) wird seit 20 Jahren im jährlichen Wechsel von Studierenden der beiden Leibniz-Institute IPK und IPB organisiert. Im Interview erläutern Christina Wäsch…
Two new N ‐glucosylated indole alkaloids were isolated from fruiting bodies of the basidiomycete Cortinarius brunneus (Pers .) Fr . The structures were elucidated by means of the spectroscopic data. Additionally, the very recently reported compounds N‐ 1‐β‐ glucopyranosyl‐3‐(carboxymethyl)‐1H ‐indole (3 ) and N‐ 1‐β‐ glucopyranosyl‐3‐(2‐methoxy‐2‐oxoethyl)‐1H ‐indole (4 ) could be detected. Compound 3 is the N ‐glucoside of the plant‐growth regulator 1H ‐indole‐3‐acetic acid (IAA), but, in contrast, it does not exhibit auxin‐like activity in an Arabidopsis thaliana tap root elongation assay.
Publikation
Wessjohann, L.; Schneider, A.;Synthesis of Selenocysteine and Its Derivatives with an Emphasis on Selenenylsulfide (-Se-S-) FormationChem. Biodivers.5375-388(2008)DOI: 10.1002/cbdv.200890038
A short survey of historic and current methods for the synthesis of selenocysteine, selenocystine, and derivatives and related compounds is presented, with an additional emphasis on the formation of selenocysteine‐derived SeS bridges. The majority of methods to the amino acid starts with protected and O ‐activated serine, but also other concepts are included such as radical or multicomponent strategies, the latter allowing also direct access to peptoids in one pot. Of special importance is the monomeric oxidative cyclization of selenocysteine–cysteine peptides to eight‐membered and larger rings with a selenenylsulfide bridge, a crucial element in several selenoproteins.