1-Ethyl-3-(3'-dimethylaminopropyl)carbodiimide → Ammonium Hydroxide

Participants

Reaction Conditions

Reaction Steps

To a solution of trans-3-furanacyrlic acid (0.10 g, 0.74 mmol) in 5 mL of dry CH2Cl2 under a nitrogen atmosphere was added HOBt (0.10 g., 0.74 mmol). The reaction mixture is stirred at 0° C. and added solid EDCI (0.143 g, 0.75 mmol). Then, stirred for 30 minutes at 0° C. A solution of compound e (0.18 g, 0.67 mmol) in 5 mL of dry CH2Cl2 was added followed by DIEA (0.177 mL, 1.01 mmol). The reaction mixture was stirred for 24 h while warming to room temperature. The reaction mixture was then poured into water (50 mL) and stirred for 30 minutes. After dilution with CH2Cl2, the organic layer was separated, washed with saturated NaHCO3, salt solution, and water. Then, dried over Mg2SO4. The compound was purified by flash column chromatography on silica gel, eluting with CH2Cl2:CH3OH:28% NH4OH (99:1:2) to give the desired product as a free base (m.p. 144-145° C.; 0.25 g, 95% yield). The hydrochloride salt was prepared from 1 M etheral HCl. (0.1 g) 1H NMR (free base 200 MHz, CDCl3) δ1.74 (m, 4H), 2.57 (m, 5H), 3.11 (m, 2H), 3.31 (m, 2H), 4.05 (m, 1H), 4.25 (m, 1H), 4.65 (m,1H), 6.58 (d, J=3.3, 7.8 Hz, 2H), 7.44 (m, 1H), 7.64 (d, J=3.3 Hz, 2H); MS (FAB) m/z 3.86 Anal. Calcd. For C18H22N3F3O3.HCl: C, 51.25; H, 5.50; N, 9.96. Found: C, 51.44; H, 5.57; N, 9.86.

Provenance & Evidence