Thionyl chloride SOC

Probably the best-known rearrangement in which an aryl group migrates from carbon to nitrogen is the Beckmann rearrangement. Here, ketoximes are converted to A-substituted amides when treated with an acidic reagent, such as sulfuric or polyphosphoric acid, phosphorus pen-tachloride or thionyl chloride (SOC ). In the context of this chapter, the amides are hydrolysed to liberate the amine. The mechanism in acid media is believed to proceed as illustrated in Scheme 8.3, where the 1,2-shift from carbon to nitrogen is noted as the key step. 

Treatment of the carboxylic acid portion on the left of the molecule with thionyl chloride (SOC ) followed by addition of the benzylic alcohols corresponding in structure to the right sides of the molecules... 

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