Iodoethane → HCID 10704698, compound

Participants

Reaction Steps

The reaction of 3-methyl-1-phenylmethyl-2-piperidinone (Meyers A I, Kunnen K B, Still W C (1987) "Conformational effects on the regiochemical metalation of C5-C13 N-benzyl lactams" J. Am. Chem. Soc., 109, 4405-4407.) (3.25 g, 16 mmol) with iodoethane (3.92 g, 25.1 mmol) in the presence of lithium diisopropylamide (prepared by treating diisopropylamine (2.42 g, 24 mmol) with butyllithium in hexanes (2.5 M, 9.2 mL, 22.9 mmol)) in THF (45 mL) and HMPA (2.4 ml,, 13.8 mmol) as described above in the preparation of Example 10, gave 5.90 g of pale yellow colored oil. Column chromatography over silica gel (hexanes-EtOAc, 9:1) afforded the product lactam (2.52 g, 68%) as a colorless viscous liquid. Analytical sample was prepared by bulb-to-bulb distillation (pot temp. 110-115° C. (1 mmHg)).

Provenance & Evidence