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Wednesday's Charts for Gold, Silver and Platinum and Palladium, November 22

Wednesday's Charts for Gold, Silver and Platinum and Palladium, November 22
kitco.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from kitco.com Daily Mail and Mail on Sunday newspapers.

Jim Wyckoff , Analytical Charts , Metals Analyst Jim Wyckoff , Gold Price , Ilver Price , S Dollar ,

TOKYO Palladium and nickel prices have touched lows not seen in several years as the result of manufacturers rearranging their supply chains to red ....

New York , United States ,

Precious Metals Prices Stagnate Amid Global Uncertainties

The Global Precious Metals MMI indicated a minor increase, with various precious metals like gold, silver, palladium, and platinum showing mixed trends due to macroeconomic factors and geopolitical tensions. ....

Metalminer Team , Via Metal , Monthly Metals Index , Middle East , Metals Prices , Metal Prices , Precious Metal ,

"Diastereoselective Pd-catalyzed Decarboxylative (4+2) Cycloaddition Re" by Andrew J. Tague, Quoc Hoang Pham et al.

A formal palladium-catalyzed decarboxylative (4+2) cycloaddition reaction between 4-vinylbenzoxazinanones and 2-nitro-1,3-enynes has been developed to produce highly valuable, densely functionalized tetrahydroquinolines in moderate to excellent yields with high diastereoselectivity under mild reaction conditions. The optimised protocol tolerates a range of substituted 2-nitro-1,3-enynes, which represent an under-utilized class of dipolarophile for transition-metal catalyzed cycloadditions. The employed reaction methodology facilitates efficient cycloaddition with both N-H- and N-Ts-4-vinylbenzoxazinanone dipole precursors. The stereochemistry of the major and minor diastereomeric (4+2) cycloadducts was determined by single crystal X-ray analyses. A mechanistic rationale for the high intrinsic diastereoselectivity and preliminary enantioselective experiments are also presented. The tetrahydroquinoline cycloadduct products feature numerous pendant functionalities, including a vinyl handl ....

2 Nitro 1 , Inyl Benzoxazinanone ,

Tuesday's Charts for Gold, Silver and Platinum and Palladium, November 21

Tuesday's Charts for Gold, Silver and Platinum and Palladium, November 21
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Jim Wyckoff , Analytical Charts , Metals Analyst Jim Wyckoff , Gold Price , Ilver Price , S Dollar ,