Bromide, synthesis

BROMIDES IN ZEOLITE SYNTHESIS / ZEOLITES IN BROMIDE SYNTHESIS AND CONVERSION... 

Zeolites as catalysts and promoters in organic bromide synthesis and conversion In the second part of this contribution the use of zeolites in the synthesis and conversion of organic bromides will be discussed (ref. 16). 

SCHEME 18. Mixed Mn/Cu-catalyzed alkylzinc bromides synthesis... 

Scheme 3. Preparation of tetraphenyl-Cp by condensation of phenylacetophenone (des-oxybenzoin) and formaldehyde in a base-catalyzed reaction followed by reductive cyclization of the 1,5-diketone with zinc in acetic add and dehydration of the 1,2-diols (32,33,43). The yield is 60%. The bromide synthesis is based on Ref. (44) (yield 70%).

Berthelette et al. [143] reported a detailed study on the stereochemistry of vinyl halide (chlorides and bromides) synthesis by the Julia-Kocienski method. In the model experiments using chloromethyl PT sulfone and anisaldehyde (Scheme 109), the isomer ratio depends on the countercation. 

Sekiya, A., Ishikawa, N. Palladium metal-catalyzed cross-coupling of aryl iodides with arylmagnesium bromides. Synthesis of fluorobiphenyls. J. Organomet. Chem. 1977, 125, 281-290. 

Hydrogen Bromide Synthesis The global reaction H2 + Br2 => 2HBr proceeds through the following chain of reactions ... 

R. Rodebaugh, J. S. Debenham, B. Fraser-Reid, and J. P. Snyder, Bromination of alkenyl glycosides with copper (II) bromide and lithium bromide synthesis, mechanism, and DFT calculations,./. Org. Chem., 64 (1999) 1758-1761. 

Borgman, R. J., Smith, R. V., Keiser, J. E. The acetylation of apo-morphine. An improved method for the selective preparation of diacetylapomorphine utilizing trifluoroacetic acid/acetyl bromide. Synthesis 1975, 249-250. 

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