Acrolein → HCID 22351214, compound

Participants

Reaction Conditions

Reaction Steps

To a flame-dried 3-neck flask under a N2 atmosphere with a magnetic stirring bar, 4-benzylpiperidine (5.00 mL, 28 mmol, 1 eq), DBU (42 μL, 0.28 mmol, 0.01 eq), and THF (100 mL) were added, mixed, and cooled to −15° C. using a CCl4/CO2(s) bath. Acrolein (1.87 mL, 28 mmol, 1 eq) was then syringed in slowly during 10 minutes maintaining the temp. at −15° C. After 0.5 hours at −15° C., phenylmagnesium chloride (2.0 M, 14.0 mL, 28 mmol, 1 eq) was syringed in slowly and the contents allowed to slowly warm to room temperature and then stirred for 48 h. The reaction was worked up by adding 0.1 N NaOH and EtOAc (200 mL each). The viscous magnesium salts were suction filtered through fiberglass filter paper. The layers were separated and the aqueous layer was extracted again with ethyl acetate (2×200 mL). The organic layers were combined, washed with brine (1×200 mL), dried (MgSO4) and the solvent removed in vacuo to yield 7.39 g of an amber oil. Flash chromatography in 100% ethyl actetate yielded 2.48 g of an orange oil. NMR (CDCl3) δ 7.40-7.10 (m, 10H); 4.93 (d of d, 1H, J=3,7 Hz); 3.12-2.96 (m, 2H); 2.68-2.46 (m, 4H); 2.01 (t of d, 1H, J=2, 10 Hz); 1.86-1.26 (m, 8H). ESI MS detects (M+H)+=310.

Provenance & Evidence