Riemschneider thiocarbamate synthesis

[1] The reaction was discovered by the German chemist Randolph Riemschneider [de] in 1951 as a more efficient method to produce thiocarbamates.

The Riemschneider reaction can also be used to create the corresponding N-substituted thiocarbamate from an alcohol or alkene.

The alcohol accepts a hydrogen ion from sulfuric acid to form a water, which then leaves, creating a carbocation.

The reaction is also not as efficient for compounds that are sensitive to concentrated acid, such as thiocyanophenols.

Various thiocyanate compounds underwent the Riemschneider synthesis to form thiocarbamates, and all had melting points similar to the predicted value.