N-BOC-ethylenediamine → HCID 86722958, compound

Participants

Reaction Steps

Titanium ethoxide (0.47 mL, 2.24 mmol) was added to a solution of (1-Hydroxy-4-oxo-cyclohexyl)-acetic acid benzyl ester (1.22 g, 4.65 mmol) and 2-(Boc-amino)ethylamine (0.97 g, 6.05 mmol) in DCM (5.0 mL) under argon. The reaction was stirred at RT for 5 hr. The reaction was concentrated in vacuo. The residue was diluted with methanol (23 mL) under argon and cooled to −78° C. Sodium triacetoxyborohydride (1.49 g, 7.03 mmol) was added in one portion and the reaction allowed to slowly warm to RT overnight. The reaction was quenched with 10% Na2CO3 and extracted with ethyl acetate (2×). The combined organic layers were washed with brine, dried over Na2SO4, filtered, and concentrated. The crude product was carried forward without purification. ESI-MS m/z 407 (MH)+.

Provenance & Evidence