<Tr> <Td> RSC ontology ID </Td> <Td> RXNO: 0000103 </Td> </Tr> <P> The Gabriel synthesis is a chemical reaction that transforms primary alkyl halides into primary amines . Traditionally, the reaction uses potassium phthalimide . The reaction is named after the German chemist Siegmund Gabriel . </P> <P> The Gabriel reaction has been generalized to include the alkylation of sulfonamides and imides, followed by deprotection, to obtain amines (see Alternative Gabriel reagents). </P> <P> The alkylation of ammonia is often an unselective and inefficient route to amines . In the Gabriel method, phthalimide anion is employed as a surrogate of H N . </P>

Give the preparation of 20 & 30 amines and mechanism of gabriel synthesis