Synthesis, Table of Contents Synthesis 2021; 53(21): 4068-4074DOI: 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 Recommend Article Abstract Buy Article All articles of this category 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. 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