Sodium Hydroxide → HCID 21897115, compound

Participants

Reaction Steps

To 124 (2.01 g, 7.0 mmol) dissolved in acetone (40 mL) was added a solution of cyclopropylamine (0.5 mL, 7 mmol) in acetone (5 mL) followed by addition of NaOH (2.8 mL, 2.5 N, 7.0 mmol) and 8 mL of water. The reaction was stirred and heated at reflux for 3 hours. The reaction mixture was poured over crushed ice. The solid that formed was collected by vacuum filtration and was dried overnight under vacuum to afford unpurified E10 (1.8 g). {A separate reaction [124, (2.00 g, 7 mmol) and cyclopropylamine (0.5 mL, 7 mmol)] yielded unpurified E10 (1.9 g).} The two lots (1.8 g and 1.9 g) were combined for purification. Column chromatography (50:50 v:v hexane:ethyl acetate) yielded a faint yellow solid (E10) (2.89 g, 67%); mp 186° C.; HPLC: Inertsil ODS 3V C18, 40:30:30 [KH2PO4 (0.01 M, pH 3.2):CH3OH:CH3CN], 264 nm, Rt 16.6 min, 94.9% purity; MS (TOF ES+) m/z 310 (M+H, 100), 312 (44.4).

Provenance & Evidence