A dinuclear 2Fe2S mimic 6 of the active site of the Fe-only hydrogenases has been synthesized. Complex 6 contains a free amino group which enables linkage to a protein backbone or to a redox active species for the study of electron transfer processes in proteins or in supramolecular systems. The structures of the complex 6 and its Boc-protected precursor 5 could be verified by X-ray crystallography.

No abstract

No abstract

Reactions of Cephalosporin Sulfones. Part 1. Rearrangement of the β-Lactam Ring to a Triazole Derivative.-Attempted one-pot conversion of the 7β-Boc-aminocephalosporin sulfone (Ia) to the corresponding 7α-methoxy derivative by in situ deprotection, diazotation and reaction with methanol results in isolation of a rearranged sulfur-free product. The 4bromophenacyl ester (Ib) gives under similar conditions the same product, which is confirmed to be the triazole (III) by X-ray diffraction. -(GUNDA, T. E.; TAMAS, L.; SALYI, S.; Tetrahedron

No abstract