Studies on the synthesis of peptides containing dehydrovaline and dehydroisoleucine based on copper-mediated enamide formation
作者:Franziska Gille、Andreas Kirschning
DOI:10.3762/bjoc.12.55
日期:——
antibiotic myxovalargin is reported. Peptide formation is based on a copper-mediated C-N cross-coupling protocol between an acyl amide and a peptidic vinyl iodide. The presence of a neighboring arginine in the vinyl iodide posed a challenge with respect to the choice of the protecting group and the reaction conditions. It was found that ornithine - a suitable precursor - is better suited than arginine for
Stereoselective Synthesis of Novel anti-MRSA Tricyclic Carbapenems (Trinems)
作者:Osamu Kanno、Isao Kawamoto
DOI:10.1016/s0040-4020(00)00413-0
日期:2000.7
(4S)-Hydroxymethyltrinem 3 was prepared via stereoselective aldol-type reaction with optically pure (R)-2-t-butyldimethylsilyloxymethylcyclohexanone ((R)-16). (4S)-Hydroxymethyltrinem 3 was converted into various kinds of trinem derivatives with anti-MRSA activity by using the Mitsunobu reaction. (C) 2000 Elsevier Science Ltd. All rights reserved.
Synthesis of 2-Amino-4-pyrimidinones from Resin-Bound Guanidines Prepared Using Bis(allyloxycarbonyl)-Protected Triflylguanidine
作者:Christoph W. Zapf、Murray Goodman
DOI:10.1021/jo035201a
日期:2003.12.1
We have synthesized novel heterocyclic compounds from resin-bound guanidines. For this purpose, an amine immobilized on a solid support was acylated with protected amino acids. Following the deprotection, the liberated amines were guanidinylated utilizing a new member of the family of diurethane-protected triflyl guanidine reagents, N,N'-bis(allyloxycarbonyl)-N' '-triflylguanidine. The deprotected