Reacción #83120

Ecuación de reacción

trans(-)-2-chlorocyclohexyl chloroformate

α-methyl-DL-tryptophylphenethylamide

triethylamine

→

title compound

Rendimiento 81.0%

(±)-Trans-2-chlorocyclohexyl [1-(1H-indol-3-ylmethyl)-1-methyl-2-oxo-2-[(2-phenylethyl)amino]ethyl]carbamate

Rendimiento 81.0%

Disolventes

THF

THF

THF

Condiciones de reacción

Tratamiento posterior

1. 1
   OtroThe solvent was removed in vacuo
2. 2
   Lavadowashed successively with 1M aqueous citric acid (2×20 mL), saturated NaHCO3 solution (2×20 mL), 1M NaOH solution (20 mL) and water (4×20 mL)
3. 3
   SecadoThe organic phase was dried over MgSO4
4. 4
   Filtraciónfiltered
5. 5
   OtroRemoval of the solvent
6. 6
   workup.DISTILLATIONby vacuum distillation

Procedimiento

To a stirred solution of trans(-)-2-chlorocyclohexyl chloroformate (0.16 g, 0.75 mmol ) in anhydrous THF (5 mL) at room temperature was added dropwise a solution of α-methyl-DL-tryptophylphenethylamide (0.23 g, 0.7 mmol) in THF (5 mL), followed by a solution of triethylamine (0.07 g, 0.7 mmol) in THF (5 mL). The reaction was complete after 30 minutes by thin layer chromatographic analysis. The solvent was removed in vacuo and the residue taken up in ethyl acetate (30 mL) and washed successively with 1M aqueous citric acid (2×20 mL), saturated NaHCO3 solution (2×20 mL), 1M NaOH solution (20 mL) and water (4×20 mL). The organic phase was dried over MgSO4 and filtered. Removal of the solvent by vacuum distillation gave the title compound (0.273 g, 81%), a white solid crystallized from ether-hexane, mp 69°-78° C. (ether-hexane); IR (film) 1709 and 1656 cm-1 ; NMR (CDCl3) δ1.2-1.4 (3H, m), 1.54 (3H, s), 1.6-1.8 (3H, m), 2.03-2.23 (2H, m), 2.63-2.69 (2H, m), 3.2-3.5 (4H, m), 3.72-3.79 (1H, m), 4.67-4.73 (1H, m), 5.23 (1H, br.s), 6.1-6.2 (1H, m), 7.0-7.6 (10H, m), 8.08 (1H, br.s); Anal. (C27H32N3O3Cl), C, H, Cl, N.

Fuente