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Showing papers by "Dorothea Fiedler published in 2003"

Encapsulation of cationic ruthenium complexes into a chiral self-assembled cage

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Dorothea Fiedler1, Daniela Pagliero1, Julia L. Brumaghim1, Robert G. Bergman1, Kenneth N. Raymond1 •
University of California, Berkeley1
18 Sep 2003
TL;DR: A chiral supramolecular assembly encapsulates the two cationic ruthenium sandwich complexes [CpRu(η6-C6H6)]+ and [cpRu (p-cymene)]+ by the chiral host as mentioned in this paper.
Abstract: A chiral supramolecular assembly encapsulates the two cationic ruthenium sandwich complexes [CpRu(η6-C6H6)]+ and [CpRu(p-cymene)]+. The host−guest complexes K11[CpRu(η6-C6H6) ⊂ Ga4L6] (2) and K11[CpRu(p-cymene) ⊂ Ga4L6] (3) were characterized by one- and two-dimensional NMR techniques as well as by electrospray mass spectrometry. Encapsulation of the prochiral complex [CpRu(p-cymene)]+ by the chiral host renders enantiotopic protons diastereotopic as evidenced by 1H NMR spectroscopy.

54 citations

Journal Article•DOI•
Highly diastereoselective reduction of ferrocene bis-imines with methyllithium and the formation of C2-symmetric Zr complexes.

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Alexandr Shafir1, Dorothea Fiedler1, John Arnold1•
Lawrence Berkeley National Laboratory1
03 Oct 2003-Chemical Communications
TL;DR: Alkylation of ferrocene bis-imines Fc[NC(H)Ar]2676(Ar = Ph, p-Tol) with MeLi was found to proceed in a highly diastereoselective fashion producing the C2-symmetric ferrocenes diamines with 90% diastereyomeric excess as discussed by the authors.

9 citations