Gold chloride synthesis

Dong S, Jin Y, Shao Y (2004) Synthesis of Gold Nanoplates by Asparate Reduction of Gold Chloride. Chem Commun... 

Synthesis of aromatic products was achieved in a stepwise fashion. For example, a reaction between conjugated enyne 12 and propargyl ether 13 in the presence of a catalytic amount of AuCl afforded cyclopropane 14 as a single regioisomer with high CM-diastereoselectivity, which in the presence of triarylphosphite gold chloride was converted selectively to the styrene 15 or fluorene 16, depending on the silver co-catalyst used (Scheme 14.4). 

Y. Shao, Y. Jin, S. Dong, Synthesis of gold nanoplates by aspartate reduction of gold chloride. 

Arylmercury compounds are also often used as starting materials for the synthesis of palladium(ll) complexes. These reactions, whose reagents and products are compiled in Table 3, typically involve the use of chloromercurio derivatives with palladium chloride complexes (entries a-d). 93>95>179-i8i Similar procedures have been applied to the synthesis of ruthenium(ll) and gold(m) complexes (entries e and f).181,182... 

A common synthetic method is that of equation (9), where X = MeC02,168 PhS03,169 NO3170 or C104,171 and relies on the precipitation of silver chloride. A variation of this method is the synthesis of the ring complex (5), by the reaction (10).172 In other cases, the synthesis may involve mercury(II) salts or sodium salts (equations 11 and 12).173,174 Another useful synthetic method involves reaction of alkyl- or aryl-gold(I) complexes with carboxylic acids or acid anhydrides (equations 13-15).176,177... 

As fax as we know, only the bis-ethylenediamine (or 1,2-diaminoethane) Aum cation, [Au(en)2]3+, has been used to prepare gold catalysts by cation exchange of zeolites, or cation adsorption on oxide supports synthesis of the complex with chloride counter-ions is easy.98... 

In this chapter there are collected short accounts of a number of reactions that do not fit easily into the previous chapters. Section 13.2 deals with the synthesis of vinyl chloride, a reaction of interest because its discovery signalled the resurgence of interest in what gold could do as a catalyst. It is also effective in the formation of C-C bonds (Section 13.3). The reactions mentioned in the other sections serve to demonstrate vividly the versatility of gold in catalysis. 

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