Nitrogen → HCID 90456988, compound

Participants

Reaction Steps

(S)-(9H-fluoren-9-yl)methyl 5-oxo-4-((m-tolyloxy)methyl)oxazolidine-3-carboxylate (825 mg, 1.921 mmol) was dissolved in CHCl3 (10 mL) and added triethylsilane (1.534 ml, 9.60 mmol) followed by TFA (10 ml, 130 mmol) and stirred at RT under positive pressure of N2 for 18 hrs. The reaction was then evaporated on rotovap until a sticky oil was left behind. The oil was dissolved in EtOAc and then extracted with sat. sodium bicarbonate (10 ml×2). There was a middle layer between the aqueous layer and organic layer that appeared to be the deprotonated product. The aqueous layer and middle layer were separated and collected and then acidified until pH 4-5. The solution formed a precipitate once acidic. EtOAc (200 ml) was used to extract the precipitate. The organic layer washed with brine, collected, dried over MgSO4, filtered and evaporated to get the pure product (S)-2-((((9H-fluoren-9-yl)methoxy)carbonyl)(methyl)amino)-3-(m-tolyloxy)propanoic acid (506 mg, 1.173 mmol, 61.0% yield) as a white solid. ESI-MS (+) m/z=454 (M+Na)

Provenance & Evidence