Treatment of hydrogermanes, R4−nGeHn (R = Hex, Et, Ph, n = 1–3), with 2 equiv of CuCl2 in ether at room temperature or in toluene under reflux led to selective replacement of an H–Ge bond with a Cl–Ge bond, giving the corresponding chlorohydrogermanes, R4−nGeHn−1Cl, selectively.
Reductive cross-coupling provides facile access to organogermanes, but it remains largely unexplored. Herein we report a nickel-catalyzed reductive Csp3–Ge coupling of alkyl bromides with chlorogermanes. This work has established a new method for producing alkylgermanes. The reaction proceeds under very mild conditions and tolerates various functionalities including ether, alcohol, alkene, nitrile
A new method was developed for the synthesis of O-trialkylgermylcarbamates by the aminocarboxylation of organylhalogermanes with carbon dioxide and secondary amines.
cobalt-catalyzed carbon–germanium bond formation provides access to a variety of functionalized germane-containing compounds, including aryl, vinyl, and alkyl germanes. The cobalt-catalyzed germylation is conducted under mild reaction conditions and exhibits a broad scope and functional group tolerance. Mechanistic experimental studies provide insight into the unexpected reaction pathway and the sequential
Nickel‐Catalyzed Reductive C−Ge Coupling of Aryl/Alkenyl Electrophiles with Chlorogermanes
作者:Pei‐Feng Su、Ke Wang、Xuejing Peng、Xiaobo Pang、Peng Guo、Xing‐Zhong Shu
DOI:10.1002/anie.202112876
日期:2021.12.13
A new C−Ge bond-forming framework was established, which bridges a gap between a recently developed mild coupling technique and organogermane chemistry. The method provides a mild approach for the synthesis of both aryl and alkenyl germanes, with improved molecular diversity and structural complexity, using readily available carbon electrophiles and chlorogermanes as starting materials.