Isobutylamine → HCID 19799595, compound

Participants

Reaction Steps

A stirred solution of 3.6 g (0.022 mole) of 1,1'-carbonyldiimidazole in 100 ml of methylene chloride under nitrogen was treated with 1.6 g (0.022 mole) of 2-methylpropylamine (added via a syringe and needle through a septum placed in one neck of the reaction flask). After stirring for 1 hr, 6.2 g (0.02 mole) of 3-[3-(trifluoromethyl)phenoxy]azetidine oxalate was added all at once followed in 30 min with 5 ml of triethylamine and stirring continued for 18 hr. The reaction mixture was washed with water (2×25 ml), dried over magnesium sulfate and concentrated in vacuo, yielding 13 g of crude solid residue. Recrystallization from ethanol/water yielded 5.9 g of product having a pink cast. A second recrystallization from cyclohexane yielded 4.8 g of fine white crystals, m.p. 124°-125° C. Rework of the filtrates yielded 1.2 g additional beige crystals. Total yield of product was 75.6% of theory.

Provenance & Evidence