Process for obtaining the enantiomeric forms of 4-cyano-1-[N-met

Details Process for obtaining the enantiomeric forms of 4-cyano-1-[N-met Process for obtaining the enantiomeric forms of 4-cyano-1-[N-met

1980-11-07

1981-12-15

Torrence, Dolph H.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260465D, C07C12178

Patent

active

043058876

ABSTRACT:
A process for obtaining the enantiomeric forms of 4-cyano-1-[N-methyl-N-(2'-{3",4"-dimethoxyphenyl}-ethyl)-amino]-5-methyl-4 -(3',4',5'-trimethoxyphenyl)-hexane and of its salts, in which the acid salt of the compound with an optically active form of O,O'-dibenzoyltartaric acid is first prepared, as a diastereomer mixture, by neutralizing the free base or by double decomposition of another salt of the compound, and the mixture is then separated by crystallization. Thereafter, the pure diastereomers thus obtained are converted to the free bases of the enantiomeric forms, or to salts thereof, in a conventional manner.

REFERENCES:
patent: 3261859 (1966-07-01), Dengel
Helv. Chim. Acta, 58 (1975), pp. 2050-2060.

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