181817-14-1Relevant articles and documents
Synthesis, stereochemical assignment, and bioactivity of the Penicillium metabolites penicillenols B1 and B2
Kempf, Karl,Schmitt, Florian,Bilitewski, Ursula,Schobert, Rainer
, p. 5064 - 5068 (2015/06/25)
The Penicillium metabolites penicillenols B1 and B2 were synthesised for the first time by elimination of a mesylated penicillenol A precursor as obtained from an l-threonine derived tetramic acid. The (Z,S)- and (E,S)-configured diastereomers were identical to the natural compounds as to NMR spectra and optical rotations. Both isomers showed antiproliferative effects against cancer and endothelial cell lines and penicillenol B1 was also notably antibiotic against Staphylococcus aureus.
Utility of 1,3,4,6-tetra-O-acetyl-2-deoxy-2-[18F] fluoroglucopyranoside for no-carrier-added18F-glycosylation of amino acids
Maschauer, Simone,Pischetsrieder, Monika,Kuwert, Torsten,Prante, Olaf
, p. 701 - 719 (2007/10/03)
A radiochemical method for the 18F-glycosylation of amino acid side chains was developed starting from peracetylated 2-deoxy-2-[ 18F]fluoroglucopyranoside (TA-[18F]FDG). O-(2-deoxy-2-[18F]fluoro-D-glucopyranosyl)-L-serine and the corresponding threonyl compound were obtained in a radiochemical yield of 25% and 12% (related to [18F]fluoride), respectively, after Zemplen deprotection within a total reaction time of 90 min. The anomeric configuration of the corresponding 19F-substituted compounds revealed preferential α-stereoselectivity. The 18F- glycosylation method using TA-[18F]FDG is compatible with the short half-life of fluorine-18 and combines glycosylation and 18F-labelling of a target compound within a single reaction step. TA-[18F]FDG is a promising 18F-labelled prosthetic group and could be adapted to 18F-labelling of bioactive peptides to study their pharmacokinetics using positron emission tomography (PET). Copyright