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MultiPrep is a cupric chloride-hydrochloric acid based micro etchant process developed by MacDermid, Inc. based in Waterbury, CT, USA. This process provides a unique roughened copper surface, which yields excellent adhesion for both solder mask and dry film photo resist applications. The process also yields excellent solder mask adhesion through subsequent silver, tin and nickel plating post solder...
The reaction of an ester with N, O-dimethylhydroxylamine and a suitable organomagnesium reagent or lithium amide base provides a general method for the preparation ofN -methoxy-N-methylamides. Application in the direct conversion of a highly hindered ester to a ketone, the azasteroid 5α-reductase inhibitor MK-0434, is described.
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