Triethylamine → HCID 21849002, compound

Participants

Reaction Conditions

Reaction Steps

1.75 g (4.97 mmol) of the title compound of Step F, 1.30 mL (0.015 mol) of oxalyl chloride (purchased from Janssen), and 2 drops of N,N-dimethylformamide were added to 50 mL of methylene chloride. The mixture was refluxed under nitrogen for 2 h and was then evaporated to dryness. 50 mL of methylene chloride was added to the residue and the resulting mixture was evaporated to dryness. Another 50 mL of methylene chloride was added to the residue, and the solution was cooled to about 0° C. 0.61 g (5.5 mmol) of 1,3-cyclohexanedione (purchased from Aldrich Chemical Company) was added followed by 2.15 mL (0.0154 mol) of triethylamine, and the mixture was stirred over 2 days while warming to room temperature. The mixture was evaporated to dryness and the crude product was chromatographed over silica gel eluting with a mixture of ethyl acetate:hexane (6:4) to yield 0.62 g of the title compound of Step G as a solid melting at 168° C. (dec). 1H NMR (CDCl3): δ2.1 (m,2H), 2.5 (t,2H), 2.7 (t,4H), 3.6 (m,2H), 4.2 (m,2H), 4.4 (m,2H), 6.1 (s,1H), 7.8 (s,1H).

Provenance & Evidence