Synthesis 2021; 53(21): 4068-4074
DOI: 10.1055/a-1534-0624
paper

Cobalt-Catalyzed Preparation of N-Heterocyclic Organozinc Reagents from the Corresponding Heteroaryl Chlorides

Alexander Kremsmair
a   Department Chemie & Biochemie, Ludwig Maximilians-Universität München, Butenandtstrasse 5–13, Haus F, 81377 München, Germany
,
Simon Graßl
a   Department Chemie & Biochemie, Ludwig Maximilians-Universität München, Butenandtstrasse 5–13, Haus F, 81377 München, Germany
,
Christoph J. B. Seifert
a   Department Chemie & Biochemie, Ludwig Maximilians-Universität München, Butenandtstrasse 5–13, Haus F, 81377 München, Germany
,
Edouard Godineau
b   Forschung & Entwicklung Stein, Syngenta Crop Protection AG, Schaffhauserstrasse 101, 4332 Stein, Switzerland
,
Paul Knochel
a   Department Chemie & Biochemie, Ludwig Maximilians-Universität München, Butenandtstrasse 5–13, Haus F, 81377 München, Germany
› Author Affiliations
We thank the Ludwig-Maximilians University Munich and Syngenta AG (Stein, Switzerland) for financial support.


Abstract

Various substituted and unsubstituted N-heteroaryl chlorides have been converted into their corresponding organozinc species using zinc dust in the presence of zinc pivalate and 10% CoCl2 in benzonitrile at 25 °C. The resulting heteroarylzinc reagents were obtained in 43–98% yield within 9–48 h and reacted with a broad range of electrophiles, leading to the functionalized heteroarenes.

Supporting Information



Publication History

Received: 08 June 2021

Accepted after revision: 22 June 2021

Accepted Manuscript online:
22 June 2021

Article published online:
29 July 2021

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