Pirisudanol

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Pirisudanol (Mentis, Menthen, Mentium, Nadex, Nadexen, Nadexon, Pridana, Stivane), also known as pyrisuccideanol, is the succinic acid ester of pyridoxine (a form of vitamin B6) and of deanol (DMAE).[1] It has been used in Europe in the treatment of mild cognitive impairment as well as fatigue and depression.[1][2][3][4][5]

Synthesis

Pirisudanol is synthesized by the following method:[6][7]

File:Pirisudanol synthesis.svg

Cyclic ketal formation between pyridoxime [33605-94-6] HCl: [58-56-0] (1) and acetone resulted in alpha4,3-O-Isopropylidene Pyridoxine [1136-52-3] (2). In the other arm of the synthesis succinic anhydride [108-30-5] (3) is then esterified with Deanol [108-01-0] (4) gives Yakton [10549-59-4] (5). Halogenation of the remaining carboxyl group with thionyl chloride gives PC135056269 (6). In a convergent synthesis, esterification between 2 and 6 gives 7. The last step consists of deblocking the protecting group by hydrolysis with 1% formic acid in ethanol to give the product (8).

Analytical data

(uv, ir, pmr, ms):[8]

See also

References

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  6. Andre Paris Esanu, DE2102831B2 (1975 to Societe D'etudes De Produits, Chimiques, Issy-Les-Moulineaux (Frankreich)).
  7. Andre Esanu, GB1447338 (1976 to Soc D Etudes Prod Chimique).
  8. Gielsdorf, W.; Klug, E. (1983). "Zur Analytik und renalem Ausscheidungsverhalten von Pirisudanol (Stivane)". Zeitschrift für Rechtsmedizin. 90 (3): 229–238. doi:10.1007/BF02116234. ISSN 0044-3433.

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