Synlett 2016; 27(04): 571-574
DOI: 10.1055/s-0035-1561279
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© Georg Thieme Verlag Stuttgart · New York

Direct Asymmetric Friedel–Crafts Reaction of Naphthols with Acetals Catalyzed by Chiral Brønsted Acids

Long Qin
a   Institute of Biochemistry & Molecular Biology, School of Life Sciences, Lanzhou University, Lanzhou 730000, P. R. of China
,
Pei Wang
a   Institute of Biochemistry & Molecular Biology, School of Life Sciences, Lanzhou University, Lanzhou 730000, P. R. of China
,
Yixin Zhang
a   Institute of Biochemistry & Molecular Biology, School of Life Sciences, Lanzhou University, Lanzhou 730000, P. R. of China
,
Zhengxiang Ren
a   Institute of Biochemistry & Molecular Biology, School of Life Sciences, Lanzhou University, Lanzhou 730000, P. R. of China
,
Xin Zhang
a   Institute of Biochemistry & Molecular Biology, School of Life Sciences, Lanzhou University, Lanzhou 730000, P. R. of China
,
Chao-Shan Da*
a   Institute of Biochemistry & Molecular Biology, School of Life Sciences, Lanzhou University, Lanzhou 730000, P. R. of China
b   State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P. R. of China   eMail: dachaoshan@lzu.edu.cn
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Publikationsverlauf

Received: 01. September 2015

Accepted after revision: 14. November 2015

Publikationsdatum:
23. Dezember 2015 (online)


Abstract

The Friedel–Crafts method synthesis of chiral ethers from various acetals and naphthols catalyzed by chiral Brønsted acids with acetic acid as an effective additive is described. We found that the chiral phosphoric acid (R)-TRIP could efficiently catalyze the asymmetric Friedel–Crafts reaction of naphthols with acetals affording chiral ethers in good enantioselectivity and yield.

Supporting Information