Gold-catalyzed homogeneous oxidative cross-coupling reactions

Angewandte Chemie - International Edition

Volumn 48, Issue 17, 2009, Pages 3112-3115

  Zhang, Guozhu ^a   Peng, Yu ^a   Cui, Li ^a   Zhang, Liming ^a  

^a UNIVERSITY OF NEVADA   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

CATALYTIC CYCLES; CROSS COUPLING REACTIONS; GOLD CATALYSIS; GOLD CHEMISTRY; METAL-CATALYZED CROSS-COUPLING REACTIONS; SELECTFLUOR;

CATALYSIS; CATALYTIC OXIDATION; CHEMICAL BONDS; GOLD COMPOUNDS;

GOLD;

EID: 70349782130     PISSN: 14337851     EISSN: None     Source Type: Journal    
DOI: 10.1002/anie.200900585     Document Type: Article

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40. For details, see the Supporting Information.
41. Although the reaction mixture is clear, filtration before the measurement using a Millex syringe-driven filter unit (450 nm diameter) is necessary to get rid of the contaminating dust; otherwise, the measurement gave particle sizes of approximately 700 nm, which must result from the dust particles, as gold particles of this size should be visible.
42. Importantly, the filtrate was still catalytically active, and an additional portion of propargylic acetate 1 was converted into product 2 in the presence of additional Selectfluor and phenyl-boronic acid without the addition of more of the gold catalyst.
43. Upon forcing the instrument to perform the measurement, the result was 2.50 nm. As a control experiment, we performed the same measurement of the reaction solvent (filtered), which was also used for zeroing, and an identical number (i.e., 2.50 nm) was obtained, suggesting that the instrument could not effectively give negative results.