How is 8-Fluoro-2-{4-[(methylamino)methyl]phenyl}-1,3,4,5-tetrahydro-6H-azepino[5,4,3-cd]indol-6-one phosphate (1:1) (CAS: 459868-92-9) typically synthesized?

The compound can be synthesized via a multi-step process involving the condensation of an azepino[5,4,3-cd]indoline derivative with a substituted aniline in the presence of a base like sodium hydride. The reaction is typically carried out in a solvent such as dimethylformamide (DMF) under reflux conditions. The yield is good, around 70-80%, with high selectivity towards the desired product.