Described herein is a novel palladium-catalyzed C–N bond-formation reaction employing aryltrimethylgermanes as the new arylating reagents. Primary/secondary amines or even amides could be smoothly arylated to provide the corresponding N-arylation products in moderate to excellent yields.
Palladium-catalyzed germylation of aryl bromides and aryl triflates using commercially available hexamethyldigermane is described. Optimized reaction conditions afforded various functionalized aryltrimethylgermanes, including drug-like molecules, in moderate to good yields, demonstrating the versatility of the presented protocols. Palladium-catalyzed germylation of aryl bromides and aryl triflates using commercially
Synthesis and spectroscopic characteristics of aryltrimethyl-silicon, -germanium, and -tin compounds
作者:S.M. Moerlein
DOI:10.1016/0022-328x(87)80344-3
日期:1987.1
The synthesis and spectroscopic characteristics of 28 para-substituted aryltrimethyl-silicon, -germanium, and -tincompounds are described. The infrared spectra show characteristic bands at 1245–1165 (methyl bend), 840–765 (methyl rock), and 1105–1020 (in-plane aromatic H bend) cm−1; the frequency of the last band was found to depend on the sum of the aromatic substituent masses, the presence or absence
Regiospecific aromatic fluorodemetallation of group IVb metalloarenes using elemental fluorine or acetyl hypofluorite
作者:H.H. Coenen、S.M. Moerlein
DOI:10.1016/s0022-1139(00)82054-0
日期:1987.6
corresponding metallated anisyl- and toluyl- compounds were 2-fluoroanisole (< 16%) and benzylfluoride (< 5.5%). No direct hydrogen substitution was observed in the other substrates investigated. The high regiospecific fluorination yields obtained make aromaticfluorination of group IVb metallated arenes (especially of tin) a very attractive preparative fluorination and radio-labelling method.
Mechanism and Selectivity of Aryltrimethylgermane Cation Radical Fragmentations
作者:Elizabeth C. Feinberg、Joseph P. Dinnocenzo
DOI:10.1021/acs.joc.0c01032
日期:2020.7.2
Aryltrimethylgermane cationradicals were generated by nanosecond transient absorption spectroscopy. Transient kinetics experiments show that the aryltrimethylgermane cationradicals react with added nucleophiles in reactions that are first-order in both the cationradicals and the nucleophiles. Preparative photo-oxidation experiments demonstrate that the intermediate cationradicals react with nucleophiles