A chiral-bridged aminotroponiminate complex of lutetium as catalyst for the asymmetric hydroamination

Nils Meyer, Agustino, Peter W. Roesky

Research output: Contribution to journalArticlepeer-review

82 Citations (Scopus)

Abstract

The enantiomerically pure bridged aminotroponiminate S,S-H 2{(iPrATI)2diph}, in which two aminoisopropyl-troponimine moieties are linked by 1,2-(S,S)-diamino-1,2-diphenylethane, has been prepared. The chiral lutetium alkyl complex of composition [(R,R)-{(iPrATI) 2diphLuCH2SiMe3(THF)] (3) was obtained via two synthetic approaches. In the first approach the dipotassium salt [(S,S)-K 2{(iPrATI)2-diph}] (1) of the ligand was reacted via a salt metathesis with lutetium trichloride to give [(S,S)-{(iPrATI) 2diph}LuCl(THF)] (2). Reaction of 2 with LiCH2SiMe 3 resulted in 3. Compound 3 can also be obtained by the reaction of [Lu(CH2SiMe3)3(THF)2] with (S,S)-H2[(iPrATI)2diph} under elimination of Me 4Si. The alkyl complex 3 was used as catalyst in the intramolecular hydroamination reaction of nonactivated terminal aminoolefins. Good catalytic activities and moderate enantioselectivties were observed.

Original languageEnglish
Pages (from-to)4179-4182
Number of pages4
JournalOrganometallics
Volume25
Issue number17
DOIs
Publication statusPublished - 14 Aug 2006

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