1986
DOI: 10.1021/ja00261a032
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Asymmetric synthesis of helical metallocenes

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Cited by 88 publications
(39 citation statements)
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“…Optically active dibenzo[c,g]phenanthrene (M)-(À)-91 bearing two fused cyclopentadienyl rings was synthesized by the photodehydrocyclization method with chirality being controlled during the cyclization process [84]. The optically active helical ferrocene (M)-(À)-92 was obtained by treatment of (M)-(À)-91 with tert-butyllithium followed by FeCl 2 ·2THF (Scheme 19).…”
Section: 12-diarylbenzo[c]phenanthrenesmentioning
confidence: 99%
“…Optically active dibenzo[c,g]phenanthrene (M)-(À)-91 bearing two fused cyclopentadienyl rings was synthesized by the photodehydrocyclization method with chirality being controlled during the cyclization process [84]. The optically active helical ferrocene (M)-(À)-92 was obtained by treatment of (M)-(À)-91 with tert-butyllithium followed by FeCl 2 ·2THF (Scheme 19).…”
Section: 12-diarylbenzo[c]phenanthrenesmentioning
confidence: 99%
“…For example, iron has been inserted into a substituted helicene in analogy with ferrocene, [51,52,53] and alkali metal ions have been suggested to form stable complexes with the helicenes. [54] It has also been suggested that suitable substitutions of the hydrogen atoms of the terminal aryl groups could allow for transition metal complexation between the added functional groups.…”
Section: Introductionmentioning
confidence: 99%
“…[25,26] A particularly striking example of a helical ferrocene derivative is provided by the helicene complex 2, first reported by Katz and coworkers. [27,28] This system, in which the iron atom is bound by a single fully π-conjugated ligand, demonstrates a structural paradigm that can potentially be extended to porphyrinoid chemistry. Specifically, one can envisage molecules of the general structure 3 (Scheme 1) which combine biliverdin-type helicity with that of 1,1Ј-disubstituted ferrocene.…”
Section: Introductionmentioning
confidence: 99%