Synthesis 2017; 49(01): 59-68
DOI: 10.1055/s-0036-1589407
paper
© Georg Thieme Verlag Stuttgart · New York

Palladium-Catalyzed Asymmetric Suzuki–Miyaura Cross Coupling with Homochiral Phosphine Ligands Having Tetrahydro-1H-imidazo[1,5-a]indole Backbone

Yasuhiro Uozumi*
a   Hubei Key Laboratory of Natural Products Research and Development, China Three Gorges University, Yichang 443002, P. R. of China
b   Institute for Molecular Science (IMS), Myodaiji, Okazaki 444-8787, Japan
c   SOKENDAI (The Graduate University for Advanced Studies), Okazaki 444-8787, Japan
d   Riken Center for Sustainable Resource Science, 2-1 Hirowasa, Wako 351-0198, Japan   Email: uo@ims.ac.jp
,
Yutaka Matsuura
b   Institute for Molecular Science (IMS), Myodaiji, Okazaki 444-8787, Japan
,
Toshimasa Suzuka
b   Institute for Molecular Science (IMS), Myodaiji, Okazaki 444-8787, Japan
,
Takayasu Arakawa
b   Institute for Molecular Science (IMS), Myodaiji, Okazaki 444-8787, Japan
c   SOKENDAI (The Graduate University for Advanced Studies), Okazaki 444-8787, Japan
,
Yoichi M. A. Yamada
d   Riken Center for Sustainable Resource Science, 2-1 Hirowasa, Wako 351-0198, Japan   Email: uo@ims.ac.jp
› Author Affiliations
Further Information

Publication History

Received: 30 September 2016

Accepted after revision: 07 October 2016

Publication Date:
27 October 2016 (online)


The authors would like to dedicate this article to Professor Dieter Enders on the occasion of his 70th birthday.

Abstract

Amphiphilic polystyrene-poly(ethylene glycol) resin-supported chiral imidazoindole phosphines (PS-PEG-L*), (3R,9aS)-2-aryl-3-(2-dialkylphosphino)phenyltetrahydro-1H-imidazo[1,5-a]indol-1-one, bearing PPh2, P(t-Bu)2, and P(c-Hex)2 groups were designed and prepared with a view toward using them in aqueous heterogeneous asymmetric Suzuki–Miyaura biaryl coupling. The asymmetric coupling of 2-substituted 1-iodonaphthalenes and 2-substituted naphthalen-1-ylboronic acid took place in water under heterogeneous conditions in the presence of 10 mol% palladium of PS-PEG-L*-Pd complexes to give up to 94% ee of (S)-2,2′-disubstituted 1,1′-binaphthyls.

Supporting Information