Synthesis of the heterocyclic core of the D-series GE2270

• Christophe Berini,
• Thibaut Martin,
• Pierrik Lassalas,
• Francis Marsais,
• Christine Baudequin and
• Christophe Hoarau

Beilstein J. Org. Chem. 2017, 13, 1407–1412, doi:10.3762/bjoc.13.137

• the D-series thiopeptides have been explored, (i) the late-stage construction of the pyridine core through [4 + 2] cycloaddition reaction flanked with the main difficulties to prepare the dienophile and alkene bearing the adequate thiazolyl moieties or (ii) the direct connection and construction of

• of thiopeptides GE2270 in which the macrocylization and heterocyclic core was simultaneously achieved through a late-stage Negishi cross-coupling [18][19]. Last year, Yamaguchi’s group proposed a novel elegant [4 + 2] cycloaddition Kondrat’eva reaction between a 2-alkenylated thiazole-4-carboxylate

Cyclisation mechanisms in the biosynthesis of ribosomally synthesised and post-translationally modified peptides

• Andrew W. Truman

Beilstein J. Org. Chem. 2016, 12, 1250–1268, doi:10.3762/bjoc.12.120

• accurately into a variety of structural classes, including linear azol(in)e-containing peptides (LAPs, e.g., microcin B17 [28], Figure 3A), thiopeptides (e.g., TP1161 [29], Figure 2) and cyanobactins [30] (e.g., patellamide A [31], Figure 2). In each class, the biosynthetic route to generate azol(in)es is

• residue required for AviCys formation derives from cysteine rather than serine. Pyridine and piperidine formation in thiopeptides Thiopeptides are a widespread bacterial RiPP family that are characterised by multiple thiazoles, dehydrated residues and a central substituted pyridine, dehydropiperidine or

• piperidine ring [69] (Figure 6A). Micrococcin was the first member to be identified [70], while the most well-studied member of the class is thiostrepton [71], whose gene cluster was the first of this class to be reported [72][73], along with the thiocillin and siomycin A gene clusters [73][74]. Thiopeptides

Synthetic studies towards bottromycin

• Stefanie Ackermann,
• Hans-Georg Lerchen,
• Dieter Häbich,
• Angelika Ullrich and
• Uli Kazmaier

Beilstein J. Org. Chem. 2012, 8, 1652–1656, doi:10.3762/bjoc.8.189

• ring system in a straightforward manner. Keywords: amidines; antibiotics; bottromycin; peptides; thiopeptides; Ugi reactions; Introduction Natural products are excellent sources as lead structures for the development of new antibiotics. Over millions of years microorganisms, such as bacteria and

Partial thioamide scan on the lipopeptaibiotic trichogin GA IV. Effects on folding and bioactivity

• Marta De Zotti,
• Barbara Biondi,
• Cristina Peggion,
• Matteo De Poli,
• Haleh Fathi,
• Simona Oancea,
• Claudio Toniolo and
• Fernando Formaggio

Beilstein J. Org. Chem. 2012, 8, 1161–1171, doi:10.3762/bjoc.8.129

• backbone modification is compatible with the preservation of its typical membrane leakage and antibiotic properties, although somewhat attenuated. Keywords: bioactivity; conformation; peptaibiotic; peptide synthesis; peptides; thiopeptides; Introduction Since their first incorporation into peptides [1