Triethylamine → HCID 88218721, compound

Participants

Reaction Steps

To a 500 mL round bottom flask, charged with 4.75 g (23.4 mmol) of N-BOC-N-methyl-4-aminopentanol (32) in 150 mL of methylene chloride, was added 5.25 g (27.5 mmol) of toluenesulfonyl chloride and 7.0 mL (49.6 mmol) of triethylamine. The mixture was stirred at room temperature for 24 h and then washed with 3×75 mL aliquots of 1 N aqueous HCl. The organic phase was dried over anhydrous magnesium sulfate, vacuum filtered, and concentrated via rotary evaporation. The residue was chromatographed on silica gel, eluting first with 20% ethyl acetate/hexane and then with 30% ethyl acetate/hexane. The fractions containing product (33) were combined and concentrated via rotary evaporation to afford 6.95 g of the product as a very pale yellow oil (83%): 1H-NMR (CDCl3) d 7.78 (2H, d), 7.31 (2H, d), 4.03 (2H, t), 3.15 (2H, t), 2.86 (3H, s), 2.42 (3H, s), 1.73-1.47 (4H, m), and 1.41 (9H, s) ppm.

Provenance & Evidence