Homochiral ligands derived from cis-1-phenylcyclohexane-1,2-diol and cis-2-azido-2-phenylcyclohexanol

Yoshito Tobe*, Hidekazu Iketani, Yuko Tsuchiya, Masayoshi Konishi, Koichiro Naemura

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

Homochiral ligands (R,R)-2, (R,R)-3a, (R,R)-3b, (S,S)-4a, and (S,S)-4b were prepared from cis-1-phenylcyclohexane-1,2-diol or cis-2-azido-2-phenylcyclohexanol and were tested as ligands for the nucleophilic addition of alkyllithiums to benzaldehyde 4-anisidineimine. While moderate enantioselectivities (up to 43% e.e.) were observed with (R,R)-3b and (S,S)-4a, (R,R)-2 and (R,R)-3a did not show enantioselectivities. Homochiral secondary amines (S,S)-6a and (S,S)-6b were also prepared from cis-2-azido-2-phenylcyclohexanol. Moderate enantioselectivities (up to 50%) were observed when they were used as chiral lithium amide base precursors for the deprotonation of 4-t-butylcyclohexanone.

Original languageEnglish
Pages (from-to)3735-3744
Number of pages10
JournalTetrahedron Asymmetry
Volume8
Issue number22
DOIs
StatePublished - 27 Nov 1997

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