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ChemicalBook CAS DataBase List FLUSPIRILENE
1841-19-6

FLUSPIRILENE synthesis

2synthesis methods
Fluspirilene, 8-[4,4-bis(p-fluorophenyl)butyl]-1-phenyl-1,3,8-triazaspiro [4,5]decan-4-one (6.6.9), is synthesized from 1-benzyl-4-anilino-4-cyanopiperidine (3.1.64) by the way of its acidic hydrolysis into the amide (6.6.6), and the subsequent heterocyclization of 4-aminocarbonyl and 4-aniline functional groups into imidazolone cycle, thus creating the desired spiroheterocyclic system, 8-benzyl-1-phenyl-1,3,8-triazaspiro[4,5] decan-4-one (6.6.7). Hydrogenation of this product using a palladium on carbon catalyst removes the N-benzyl protecting group, forming 1-phenyl-1,3,8-triazaspiro [4,5]decan-4-one (6.6.8). Alkylating this with 1,1-bis-(4-fluorophenyl)butyl bromide (6.6.3) gives fluspirilene (6.6.9) [64–66].

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