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Rieke R.D.,Metals USA | Kim S.-H.,Dankook University
Tetrahedron Letters | Year: 2012

A facile synthetic protocol for the preparation of tertiary amides has been developed. The title compounds have been successfully obtained by the Pd-catalyzed cross-coupling reactions of readily available aryl and benzyl organozinc reagents with the appropriate carbamoyl chlorides. © 2012 Elsevier Ltd. All rights reserved.

Hatch G.P.,Metals USA | Hatch G.P.,Innovation Metals Corporation
Elements | Year: 2012

The long-term growth of numerous industries will depend on the ability to secure stable and diverse sources of rare earths. Recent years have seen unprecedented volatility in this sector, with the rare earths being increasingly considered as strategic and critical to a wide range of technologies. During the next few years, demand for some of the rare earths is expected to exceed supply. Chinese export-quota policies have had a severe impact on the market. Worldwide exploration efforts are now leading to the deployment of a rare earth supply chain based outside China.

A novel organozinc reagent, 4-coumarinylzinc bromide, was prepared by the direct oxidative addition of active zinc to 4-bromocoumarin. The resulting organozinc bromide underwent the palladium-catalyzed cross-coupling reactions with a variety of aryl halides and acid chlorides affording the corresponding coupling products in good yields under mild conditions. © 2011 Elsevier Ltd. All rights reserved.

Rieke R.D.,Metals USA | Kim S.-H.,Dankook University
Tetrahedron Letters | Year: 2011

A facile synthetic route to the direct preparation of 5-bromo-2-pyridylzinc iodide has been developed. Treatment of 5-bromo-2-iodopyridine with active zinc gave rise to the selective oxidative addition to C-I bond under mild conditions. The resulting organozinc iodide has been used in the variety of coupling reactions affording the corresponding cross-coupling product. © 2010 Elsevier Ltd. All rights reserved.

A method of making sputter targets using rotary axial forging is described. Other thermomechanical working steps can be used prior to and/or after the forging step. Sputter targets are further described which can have unique grain size and/or crystal structures.

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