Ammonia → Modafinil

HRID 1393699Notes

Reaction equation

HRID 1393699 reaction equation
[CH:1]([S:14]([CH2:16][C:17]([O-:19])=O)=[O:15])([C:8]1[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[NH3:20]>>[CH:1]([S:14]([CH2:16][C:17]([NH2:20])=[O:19])=[O:15])([C:8]1[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

Participants

3

Reactant 2

HCID 222AmmoniaHCID 19020205(-)-Benzhydrylsulfinylacetate

Product 1

HCID 4236Modafinil

Procedure

Lafon also disclosed the use of an intermediate, a racemic mixture of benzhydrylsulphinylacetic acid to prepare an isomer of modafinil in U.S. Pat. No. 4,927,855, referring to French patent 2,326,181B. The racemic mixture of the acid was reacted with the (−)-α-methylbenzylamine to provide the (−)-benzhydrylsulphinylacetate of (−)-methylbenzylamine which is acidified with concentrated hydrochloric acid to provide (−)benzyhydrylsulphinylacetic acid. The levo-acid thus produced was then reacted with methylsulfate in water and sodium bicarbonate to provide methyl(−)benzhydrylsulphinylacetate. The acetate was then amidated with ammonia gas to provide (−)benzhydrylsulphinylacetamide.

Sources & evidence

ORD record
ord-3e70ead699b74ccd91fc5f019952a6b8
Source dataset
uspto-grants-2008_03
Patent number
US07345188B2

Reaction notes

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