Reaktion #95210

Reaktionsgleichung

4,4'-bis(N,N-dimethylamino)benzhydrol

methyl ether

p-chloroglycolanilide

tetrahydro-furan

→

4'Chloro-2[-bis(p-dimethylaminophenyl)methoxy]acetanilide

Lösungsmittel

acetic acid

n-hexane

Reaktionsbedingungen

Aufarbeitung

1. 1
   Sonstigewas removed
2. 2
   workup.ADDITIONColor was then discharged by the addition of 20 drops of tetramethylguanidine
3. 3
   Filtrationthe solution was filtered hot
4. 4
   workup.ADDITIONHexane was added to the filtrate
5. 5
   Sonstigeyielding a light green oil
6. 6
   SonstigeThe oil was removed
7. 7
   Temperaturthe hexane solution, on cooling
8. 8
   Sonstigegave a light blue solid
9. 9
   FiltrationThe solid was filtered
10. 10
    Waschenwashed with petroleum ether
11. 11
    Sonstigedried
12. 12
    SonstigeRecrystallization from 150 ml methylcyclohexane/40 ml acetone
13. 13
    Sonstigegave a yellow-white, gummy solid
14. 14
    SonstigeThis was recrystallized from VM&P naphtha
15. 15
    Sonstigeto give a fine white powder, mp 137.5°-140° C.

Vorschrift

A solution of 4,4'-bis(N,N-dimethylamino)benzhydrol, methyl ether, (8.0 g, 0.028 mole), p-chloroglycolanilide (5.23 g, 0.028 mole), 170 ml of tetrahydro-furan, 120 ml of n-hexane, and 4.5 ml of glacial acetic acid was refluxed for about 8.5 hours, replacing solvent as distillate was removed. Color was then discharged by the addition of 20 drops of tetramethylguanidine and the solution was filtered hot. Hexane was added to the filtrate, yielding a light green oil. The oil was removed and the hexane solution, on cooling, gave a light blue solid. The solid was filtered, washed with petroleum ether and dried. Recrystallization from 150 ml methylcyclohexane/40 ml acetone gave a yellow-white, gummy solid. This was recrystallized from VM&P naphtha to give a fine white powder, mp 137.5°-140° C.

Quelle