Modulation of the coordination geometries of NCN and NCNC Rh complexes for ambidextrous chiral catalysts

Jun-Ichi Ito; Takahiro Ishihara; Takaki Fukuoka; Siti Rokiah Binti Mat Napi; Hajime Kameo; Hisao Nishiyama

doi:10.1039/c9cc06520b

Modulation of the coordination geometries of NCN and NCNC Rh complexes for ambidextrous chiral catalysts

Chem Commun (Camb). 2019 Nov 4;55(85):12765-12768. doi: 10.1039/c9cc06520b. Epub 2019 Sep 26.

Authors

Jun-Ichi Ito¹, Takahiro Ishihara², Takaki Fukuoka², Siti Rokiah Binti Mat Napi², Hajime Kameo³, Hisao Nishiyama²

Affiliations

¹ Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan. jito@chembio.nagoya-u.ac.jp.
² Department of Applied Chemistry, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan. hnishi@chembio.nagoya-u.ac.jp.
³ Department of Chemistry, Graduate School of Science, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan.

PMID: 31556411
DOI: 10.1039/c9cc06520b

Abstract

A chirality switch between novel NCN pincer Rh complexes and a related double cyclometalated NCNC Rh complex containing secondary amino groups is described. Their catalytic abilities were determined in asymmetric alkynylation of ethyl trifluoropyruvate, and the change in the coordination geometry of the Rh catalysts affected the stereochemistry of the products.