How is N~2~-[(Benzyloxy)carbonyl]-L-glutamine (CAS: 2650-64-8) typically synthesized?

N~2~-[(Benzyloxy)carbonyl]-L-glutamine (CAS: 2650-64-8) is synthesized via a multi-step process, often starting with L-glutamine as the primary substrate. The key steps involve protection of the amine group with a benzyloxycarbonyl (CBZ) group using appropriate reagents, followed by deprotection under specific conditions to yield the final product. This synthesis typically requires the use of catalysts and involves careful control of reaction conditions to achieve optimal yields.