Reaction #2389092

Reaction equation

tetrafluorophthalic anhydride

(R)-α-methylbenzylamine

→

desired product

Yield 64.0%

(R)-2-(1-cyclohexylethyl)-4,5,6,7-tetrafluoro-1H-isoindole-1,3-dione

Yield 64.0%

Solvents

chloroform

Conditions

Workup

1. 1
   TemperatureAfter cooled
2. 2
   Otherpurified by silica gel column chromatography (eluent; methylene chloride:methanol=30:1 v/v)
3. 3
   Otherrecrystallized from a mixed solvent of n-hexane-ethyl acetate

Procedure

220 mg of tetrafluorophthalic anhydride and 127 mg of (R)-α-methylbenzylamine were charged in an egg-plant type flask of 50 ml, followed by stirring under heating at a temperature of 180° C. for 1.5 hours. After cooled, the reaction product was dissolved in chloroform, purified by silica gel column chromatography (eluent; methylene chloride:methanol=30:1 v/v), recrystallized from a mixed solvent of n-hexane-ethyl acetate, to obtain 210 mg of the desired product as a colorless powder. Yield: 64%. m.p. 147-148° C.; [α]20D=−5.13° (C=0.658 AcOEt); MS(EI+) 329(M)+

Source