Toluene → HCID 131730314, compound

Participants

Reaction Steps

A 50% aqueous solution of sodium hydroxide (3 ml) was added to a suspension of allyl bromide (693 mg, 5.70 mmol), cis(±)ethyl 4-[(tert-butoxycarbonyl)amino]-3-hydroxypiperidine-1-carboxylate (reference: C. H. Lee et al. Syn. Commun., 2001, 31, 1081), (750 mg, 2.6 mmol), benzyltriethylammonium chloride (4 mg, cat.) and toluene (8 ml). The resultant mixture was stirred overnight at room temperature. The reaction mixture was diluted with EtOAc (150 ml) and water (35 ml). The organic phase was separated and the aqueous phase was back extracted with EtOAc (2×30 ml). The combined organic phase was washed with brine, dried over sodium sulfate, filtered and concentrated. The crude residue was purified by flash column chromatography (hexane/EtOAc, 3:2) to yield 734 mg of the title compound. MS (ES)(M+H): 329. for C16H28N2O5; NMR: 1.28 (t, 3H), 1.47 (s, 9H), 1.68 (m, 2H), 2.88 (brt, 2H), 3.50 (m, 1H), 3.68 (m, 1H), 3.90 (m, 1H), 4.00-4.45 (m, 3H), 4.10 (q, 2H), 4.92 (brs, 1H), 5.20 (m, 2H), 5.86 (m, 1H).

Provenance & Evidence