Triethylamine → HCID 10236373, compound

Participants

Reaction Steps

A mixture of N-(cyclopropyl)cyclopropanecarboxamide (A) (2.08 g, 16.6 mmol) and methyl trifluoromethanesulfonate (1.88 mL, 16.6 mmol) was warmed at 65° in a nitrogen atmosphere. After a few minutes a clear melt was obtained. After 20 min, the melt was cooled and formation of the imino ether triflate salt (B) confirmed by an NMR spectrum. Toluene (26 mL), triethylamine (3.86 mL, 27.7 mmol) and adamantane-1-carbohydrazide (C) (2.15 g, 11.1 mmol) were added, and the two-phase mixture was stirred at 65° for 5 h. The mixture was heated at 110° for 3 h. The cooled reaction was diluted with ethyl acetate (75 mL), washed with water (75 mL) and saturated brine (30 mL), and dried (MgSO4). The ethyl acetate was evaporated in vacuo to give 2.92 g of a yellow syrup. Flash chromatography on silica gel with ethyl acetate eluted the oxadiazole D. Elution with 7% methanol in chloroform and evaporation in vacuo gave crude 4-77. Recrystallization from isopropyl ether afforded pure 3-(1-adamantyl)-4,5-dicyclopropyl-4H-1,2,4-triazole) (4-77). MS: 284 (M+1).

Provenance & Evidence